How Dominik Mysterio Lost the AAA Mega Championship at Triplemanía 34

The title changed hands on Triplemanía 34 Night 2

Result: El Grande Americano pinned Dominik Mysterio and won the AAA Mega Championship on Sunday, September 13, 2026, at Arena CDMX in Mexico City. Rey Mysterio entered after the original referee was knocked out and made the three-count. WWE's official Night 2 recap records the match as a No Disqualification championship victory. That is the result to keep separate from the many attacks and run-ins that made the match feel chaotic.

For a viewer searching only “Dominik lost AAA title,” two details matter immediately. The loss came on Night 2, not on Friday's Las Vegas portion of Triplemanía, and El Grande—not Rey—became champion. Rey's final role was to count a fall already created by the wrestlers in the ring. Neither the presence of Dominik's allies nor an argument about whether Rey was impartial changes the recorded winner. The rest of this recap explains how the finish reached that point and why some fans disliked the way it was presented.

Why the date is September 13 despite the WWE URL

The official result page has a confusing web address containing `2026-09-11`, and its parent event wrapper carries Friday data. That path segment is not the date of the Night 2 title change. The page identifies itself as “Night 2 results” and shows a September 13 publication date. More decisively, WWE's two-night announcement puts Friday, September 11 in Las Vegas and Sunday, September 13 at Arena CDMX. The separate Night 2 event listing also says Sunday, September 13. This article uses the explicit event date rather than treating a shared CMS path as a second result.

The two locations also frame the storyline. Rey's Friday match with Omos belonged to Night 1; the championship defense involving his son was on Sunday in Mexico City. A fan watching a clip without that context might assume the title switch happened on the same night as Rey's earlier loss, or on Monday's Raw in the same arena. It did not. Keeping the show, city and date together is the simplest way to avoid mixing three different appearances in WWE's busy Mexico schedule.

Who entered and left as AAA Mega Champion

Dominik arrived as champion. WWE's September 12, 2025 Worlds Collide result records his victory over El Hijo del Vikingo for the AAA Mega Championship. By Triplemanía 34 he had held it for roughly a year. WWE's pre-show card listed Dominik Mysterio (c) versus El Grande Americano, establishing a conventional champion-and-challenger pairing before the broadcast revealed its No Disqualification condition.

The Sunday result reversed that order: El Grande left Mexico City as the AAA Mega Champion, while Dominik left without that AAA belt. The switch is significant even to a fan who follows only WWE television because both men and Rey also appear across WWE-linked stories. Yet the AAA Mega Championship has its own title record; a win, loss or interference on another WWE show does not automatically transfer it. For the exact championship handoff, use the Sunday Triplemanía result rather than a later six-man tag outcome.

Inside the No Disqualification finish

The championship match did not stay a simple one-on-one contest. WWE's official report identifies it as a No Disqualification match, while POST Wrestling's live account says the stipulation was disclosed during the Night 2 broadcast after the earlier card had listed a standard singles title bout. That distinction helps explain why chairs, belts and outside involvement did not immediately end the match. No DQ does not remove the need for a pinfall or submission to settle the championship; it changes what can happen on the way to that result. The key sequence is not “Rey handed over the belt” but a fight in which El Grande survived several openings for Dominik and then scored the decisive fall.

Weapons and run-ins made the match unstable

WWE specifically lists the steel ring steps, a chair and a belt belonging to Dorian Roldán among the weapons. It also names JD McDonagh's interference and the entry of Rayo and Bravo Americano, followed by Omos taking them out. Liv Morgan later became involved as well. Those names are not incidental background: each shift altered whether the champion or challenger had room to build a finishing sequence. POST's detailed report describes Dominik using a chair and Roldán's belt early, McDonagh interrupting El Grande, Los Americanos fighting back, Omos clearing them, and Liv interfering near the end.

El Grande also had to contend with Omos personally after Omos had already beaten Rey on the Friday card and won Sunday's Copa Bardahl. The official recap says the challenger neutralized Omos, a turning point because the giant's presence threatened to make the final minute another numbers advantage for Dominik. It would be easy to compress all of this into “everybody interfered,” but the useful distinction is which involvement actually preceded the pin: El Grande made it past the supporting cast and still had to beat Dominik in the ring. The crowd may have enjoyed the spectacle, but the many moving parts also explain complaints about an overloaded finish.

The referee bump gave Dominik another opening

WWE says El Grande accidentally took out the match official. With that referee unavailable, Dominik reached for the AAA Mega Championship belt as a weapon. The official recap describes him using it; POST's longer sequence describes a belt-shot attempt around the same stretch. The safest reading is that the championship itself became part of Dominik's attempted recovery, while the downed official meant no one was ready to count a fall. Dominik still had a chance to finish with his Frog Splash, but WWE says El Grande avoided it. An apparent opening created by the chaos was therefore temporary, not a title defense already secured.

POST also describes a previous 619 and Frog Splash combination that had not ended the match. That earlier near fall matters because the final missed Frog Splash was not Dominik's first offensive surge. El Grande had already survived a significant part of the champion's repertoire before the official went down. But there is no need to stretch the sequence into a claim that a referee deliberately favored one wrestler or that a specific ally ordered the interruption. WWE's account gives a straightforward match fact: the original official was accidentally hit, and the bout continued under No DQ rules.

El Grande's headbutt and Rey's three-count

The decisive offense belonged to El Grande. WWE says he evaded Dominik's Frog Splash and connected with a flying headbutt. Rey Mysterio then came in as the new referee and counted three. POST's live account adds that the challenger initially had Dom covered while no official was there to count; Rey arrived in referee attire to complete the fall. Either way, the recorded decision is a pinfall victory for El Grande Americano, not a disqualification, no contest or administrative title award.

That matters when judging the result. The interference and the replacement referee are integral to how the story was presented, and a fan can fairly criticize the density of run-ins. Yet the official result gives a precise end point: El Grande put Dominik down and a recognized referee counted the fall. Any future claim that the championship changed again would need another official result, not a reading of this chaotic final minute.

What Rey Mysterio actually did as special referee

Rey Mysterio was not the official who began Dominik versus El Grande, and WWE's pre-show match listing did not advertise him in that role. The original referee went down in the No Disqualification main event. After El Grande hit Dominik with the flying headbutt, Rey appeared as the replacement referee and counted the pin. WWE identifies him as the AAA General Manager in both its Friday and Sunday reporting, but the official Night 2 account describes a wrestling decision, not an executive order that simply handed El Grande a championship. The distinction is crucial when a dramatic family beat becomes shorthand for the actual finish.

Rey's arrival also made sense within the weekend's on-screen narrative. On Night 1, Omos defeated him in Las Vegas to earn reinstatement to AAA; WWE's Friday result also describes Omos attacking him after the match. On Sunday, Omos intervened against El Grande's side during Dom's title defense. Seeing Rey return after those events added a payoff, especially with his son involved. But the prior injury presentation and his appearance in referee attire do not establish that he had been secretly assigned to officiate from the start, and there is no need to invent such an arrangement.

There is a sharp historical contrast. WWE published a September 2025 clip titled “Rey Mysterio crowns Dominik Mysterio the AAA Mega Champion.” Roughly one year later, Rey supplied the three-count that ended that reign. That parallel adds meaning for fans who follow their family story, but it should not be mistaken for a hidden rule change. The belt moved because El Grande won a sanctioned title match by pinfall. The image of Rey counting against Dom was storytelling around that match result.

A count decided the pinfall, not a title award by decree

WWE's Night 2 recap says El Grande avoided the Frog Splash, struck with a flying headbutt, and Rey gave the three-count. POST Wrestling describes Rey arriving in referee clothing after an initial covering attempt lacked an official to count. Both accounts support the same outcome: a pinfall, with Rey performing the count. Neither describes a disqualification or the general manager stripping Dominik without a match finish. That is why a results database should record El Grande defeating Dominik, with Rey's role noted as part of the finish.

Could Dominik protest the replacement referee within the storyline? A character can certainly complain after a loss. But until AAA or WWE announces a reversal, rematch or disciplinary ruling, it would be fiction to present one as fact. The results page and champions page provide the next checks. The result we can verify on September 27 is El Grande as the new AAA Mega Champion.

Why the finish divided fans

There are two different questions in the arguments about the main event. One asks whether the No Disqualification result is official; WWE's recorded pinfall answers that. The other asks whether the match benefited from the amount of interference; that is a judgment about presentation. The two questions can have different answers. A fan may celebrate El Grande Americano's title win and still wish Dominik Mysterio had lost after more uninterrupted wrestling. Another may see the procession of allies as the very reason the new champion's survival felt dramatic. Neither reaction can be converted into an unreported backstage explanation for the booking.

The critics themselves do not agree. POST Wrestling's reviewer described the run-ins as an overfull, at times silly AAA-style spectacle but also found the atmosphere and title-closing moment compelling. PWTorch's reporter judged the outside involvement as adding to the drama. Those are attributed assessments of the same event. Neither changes that Rey counted a pin after El Grande's headbutt.

No DQ allowed the run-ins, but fans can dislike the presentation

Because the match was No Disqualification, the appearance of JD McDonagh, Los Americanos, Omos and Liv Morgan did not call for a routine DQ decision. No DQ is a match condition that permits more physical chaos; it is not an assurance that every such choice will satisfy every viewer. In a standard match, a similar string of intrusions could raise a straightforward officiating question. Here it raises a pacing and focus question instead: when several people take turns affecting the action, does the champion-versus-challenger conflict remain clear? The official recap and the detailed reports give enough evidence for readers to form their own answer.

What cannot be inferred from the stipulation is that the title changed because the referee “let interference happen.” The decisive count occurred only after the challenger had overcome the chaos and hit Dominik. A viewer who prefers a simpler finishing stretch can still be precise: the complaint is that the finish was crowded, not that WWE has secretly voided the outcome. That precision also protects the new champion's achievement from being erased by the supporting cast, even if the run-ins remain part of the story.

What a reaction thread can and cannot prove

A post-show discussion thread illustrates the split without measuring it. One commenter liked El Grande winning but argued that too much interference made Dominik less convincing; another said the main event drew them into the title story despite less familiarity with its buildup. Other comments imagined a later Rey-versus-Dominik match. Those are individual reactions and guesses, not a representative poll or an official announcement. The thread cannot tell us why AAA planned the finish, how most viewers felt, or what match will be booked next.

That leaves a useful viewing question rather than a fabricated answer: will the follow-up focus on El Grande defending the Mega Championship, Dominik demanding another chance, or the broader Rey-Omos conflict? The Triplemanía finish creates those possible directions, but only later announcements and results can confirm which one actually happens. Fans who enjoyed the chaos and fans who disliked it can agree on that limit.

What changed after Dominik's reign ended

The immediate change is a champion, not merely a feud beat: El Grande Americano took the AAA Mega Championship from Dominik Mysterio by pinfall on September 13. WWE's next-night Raw report calls him the new AAA Mega Champion. It also records El Grande and new Women's World Champion Stephanie Vaquer defeating Dominik and Liv Morgan in a mixed tag match by disqualification after Judgment Day interference. That result continued the personal conflict, but it did not put the Mega belt up for grabs or reverse the prior night's title switch.

This is a useful reminder about results language. A disqualification in a mixed tag can tell fans that the rivalry remains unsettled without changing a separately held singles championship. Likewise, a wrestler appearing in a later team match while carrying a belt is not automatically a defense of that belt. Look for an announced AAA Mega Championship stipulation and a recorded finish before updating the title lineage. WWE's official Night 2 recap and its Raw description together support El Grande as the champion after the weekend; they do not by themselves guarantee a particular length for his reign.

El Grande's first steps as champion and the next watchpoint

AAA's September 19 television results say Dorian Roldán teased an October 3 Domo de la Feria announcement in response to Triplemanía. That is a storyline development, not yet a confirmed Mega title defense. A fan curious whether Dominik receives a rematch should look for a named opponent, date and championship condition in an official AAA or WWE event listing instead of turning the tease into a booked match. The same caution applies to social posts predicting a Rey-versus-Dominik singles bout: the Triplemanía count makes one plausible as speculation but does not announce it.

WWE has already brought the principals back together in another advertised setting. Its Worlds Collide card lists CM Punk, Rey Mysterio and El Grande Americano against Dominik Mysterio, JD McDonagh and Omos in a six-man tag at the September 26 arena show. WWE says the YouTube program premieres Wednesday, September 30 at 7 p.m. Eastern / 4 p.m. Pacific. As of this article's September 27 check, the broadcast is still ahead; the advertised six-man is neither an AAA Mega Championship match nor a substitute for an official result after the premiere. Its value for this story is in showing that the rivalry's characters still share a ring.

For now, the clean timeline is easy to retain: Dominik beat El Hijo del Vikingo for the belt in September 2025; El Grande pinned Dominik in Mexico City on September 13, 2026; Raw's mixed-tag DQ on September 14 continued the conflict without changing that championship. Follow the upcoming schedule and confirmed results for an announced defense. If a later show produces one, it should be treated as new evidence, not retroactively read into a crowd-pleasing but complicated Triplemanía finish.