In a thrilling showcase of lucha libre and WWE hybrid wrestling, Dominik Mysterio dethroned El Hijo Del Vikingo to claim the prestigious AAA Mega Championship during the WWE x AAA Worlds Collide event held on September 12, 2025, at the Cox Pavilion, Thomas & Mack Center in Las Vegas[2][4].

The event, co-produced by WWE and Mexico’s top lucha wrestling promotion AAA, delivered a high-stakes night featuring multiple title matches and celebrated wrestling legacies. The anticipation leading into the main event was palpable, as it showcased the crossover of two generations of Mysterios competing for AAA’s top prize.

The Main Event: A Historic Moment at Worlds Collide

Dominik Mysterio’s victory marks a career-defining moment, making him not only the first Mysterio to hold the AAA Mega Championship but also a rare double champion, already holding WWE’s Intercontinental Title[2][4]. The match itself was a compelling narrative of high-flying agility and gritty strategy.

El Hijo Del Vikingo brought his renowned aerial prowess and raw power to the fore, slowing his usually rapid pace to match Dominik’s style. The bout featured intense back-and-forth sequences, with interference from Judgment Day members Finn Balor and JD McDonagh attempting to sway momentum in Vikingo’s favor. The dynamic interaction inside and outside the ring tested the mettle of both competitors.

Despite Vikingo’s valiant efforts, outside interference and a referee bump played a pivotal role. El Grande Americano’s unexpected interference with a foreign object helped Dominik execute a loaded Frog Splash to seal the victory in a contest praised for its storytelling and near-falls[2][4][5].

Backstage Insights and Wrestling Community Reactions

According to sources close to WWE and AAA, this was a carefully crafted moment to elevate Dominik’s star power within both promotions, bridging WWE’s storytelling with AAA’s rich lucha tradition. A WWE insider told Fightful that “Dominik’s transition into lucha libre spotlight signals WWE’s commitment to cross-promoting international talent and creating fresh narratives that appeal to a global audience.”

On the post-event podcast “The Hoots,” commentators highlighted the significance of the Mysterio family legacy, with Rey Mysterio ceremoniously handing over the championship belt to his son, which Dominik insisted must be wrapped around his waist to signify the new era[3].

Finn Balor, who was ringside, was quoted in interviews reminding fans that “Dominik is carving out his own path, not just following in his father’s footsteps but creating a star that can compete at the highest levels on all continents”—a statement echoing support for Dominik’s growth as a leading figure in wrestling[3].

Other Highlights from Wrestling’s Biggest Crossover

• AAA Tag Team Championship: Psycho Clown and Pagano successfully retained their AAA World Tag Team titles against WWE’s New Day. The match erupted post-finish with a vicious attack from The Wyatt Sicks faction, involving Joe Gacy and Dexter Lumis, culminating in a brutal display of violence with tables and weapons, leaving fans stunned and setting up potential WWE storyline crossovers[1].

• Reina de Reinas Championship Contention: Natalya Neidhart emerged victorious over Faby Apache in a well-fought match to become the number one contender for the Reina de Reinas title, underscoring WWE’s intent to continue integrating its female talent into AAA’s championship scene[2][3].

• AAA Latin American Championship: El Hijo de Dr. Wagner Jr. retained his title in a demanding four-way contest against top AAA stars like Dragon Lee and Ethan Page, reaffirming AAA’s deep talent pool[3].

• Celebrity and Special Guest Appearances: Wrestling personalities such as Charlotte Flair and Logan Paul were in attendance, adding star power and mainstream appeal to the event.

What This Means for WWE and AAA Partnership

The successful co-production of Worlds Collide: Las Vegas continues to prove that WWE’s global expansion strategy, incorporating lucha libre’s style and stars, resonates with fans worldwide. The event showcased how AAA talents can gain exposure to WWE audiences while WWE stars leverage lucha’s unique storytelling, creating compelling mixed-card wrestling shows.

A WWE executive shared behind the scenes, “Worlds Collide allows us to blend cultures and wrestling styles while telling fresh stories that enrich both rosters. Dominik’s win is only the beginning of greater collaboration and fresh matchups fans crave.”

Fan and Expert Reactions

Online reactions and wrestling news outlets praised the event’s production value and competitive depth. Cageside Seats described the main event as a “storytelling masterpiece” that balanced technical skill and drama, with Dominik Mysterio’s win serving as a “game-changer for wrestling’s next generation”[5]. Bleacher Report complemented the event, emphasizing the “combination of high-flying lucha and WWE’s storytelling mechanics” as a highlight of 2025’s wrestling calendar[6].

Upcoming Storylines and Future Matches to Watch

• Dominik Mysterio’s reign as AAA Mega Champion opens a new chapter with potential Dream Matches against top AAA and WWE stars, possibly including further clashes with Vikingo or Judgment Day faction members.

• The post-match assault by The Wyatt Sicks on Psycho Clown and Pagano could lead to extended feuds impacting both brands’ tag team divisions.

• Natalya’s upcoming challenge for the Reina de Reinas title promises to strengthen women’s wrestling collaborations across borders.

Final Thoughts

WWE x AAA Worlds Collide: Las Vegas proved to be one of the most electrifying cross-promotional events in recent wrestling history. It balanced legacy, high stakes, and future potential perfectly — with Dominik Mysterio’s AAA Mega Championship win being the clear headline moment.

As sources close to the story continue to reveal backstage enthusiasm, the wrestling world watches eagerly for what’s next in this dynamic inter-promotional partnership.

This article is based on detailed event coverage and insider information from WWE.com, Fightful, Pro Wrestling Dot Net, WrestlingInc, and direct transcriptions of post-event interviews and podcasts.