As if you needed another reason to watch Avatar: Fire and Ash, the Avengers: Doomsday trailer will reportedly play in front of James Cameron's threequel

Fire and Doom: Marvel's Next Big Reveal

The first official footage from Avengers: Doomsday is expected to premiere ahead of James Cameron’s upcoming film, Avatar: Fire and Ash, according to Collider. Audiences catching Cameron’s third trip to Pandora will get an early look at the new Avengers chapter.

Avatar: Fire and Ash is set to release on December 19 and introduces the Ash People of Pandora. The trailer drop means fans will see the first glimpse of Avengers: Doomsday nearly one year before its theatrical debut on December 18, 2026.

Trailer Timing Compared to Previous Films

In contrast, the Avengers: Infinity War trailer arrived about six months before the film’s release, while Avengers: Endgame held off even longer, showing footage only five months prior—and mostly from the movie’s opening half hour.

What This Means for Marvel Studios

Whether this extended one-year build-up signals Marvel Studios’ heightened confidence in Doomsday is still uncertain, but it’s likely to spark major speculation about the project, which has been kept tightly under wraps until now.

Cast and Cameos

Robert Downey Jr. will appear, joined by the casts of Fantastic Four and Thunderbolts, along with several established MCU heroes and legacy X-Men characters. The complete cast list was unveiled in March during a six-hour live stream.

Channing Tatum, who plays Gambit, teased fans by stating that “Avengers: Doomsday could be the biggest film of the decade.”

Summary

Author’s Summary: The trailer for Avengers: Doomsday will debut before Avatar: Fire and Ash, launching an enthusiastic year-long buildup for what may become Marvel’s biggest release yet.

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GamesRadar+ GamesRadar+ — 2025-11-07