Marvel Rumored to Debut First ‘Avengers: Doomsday’ Trailer With Upcoming Avatar Release

Marvel fans may see the first Avengers: Doomsday trailer before the end of 2025. The rumor grew after Collider reported that the trailer could appear with Avatar: Fire and Ash screenings. The film is set to open on December 19 in the United States. This report has led to rising interest across the superhero fan base.

The idea gained attention because both films are released under Disney. That makes the pairing possible, even if the plan has not been confirmed. Marvel has also kept a long silence about the project, so many fans see this rumor as a hopeful sign.

Avengers: Doomsday Trailer Rumor Sparks Major Fan Interest

According to Collider, several of their sources claim Disney is considering the trailer launch during Avatar: Fire and Ash screenings. The move would give Marvel a huge audience during the holiday season. Many fans are eager to see Robert Downey Jr. in his new role as Doctor Doom after a brief tease in Fantastic Four: First Steps.

The post-credit scene of that film showed Doom holding the child of Mr. Fantastic and Sue Storm. The scene did not reveal Downey’s face. A trailer attached to a major film would change that and give fans an early look almost one year before release.

Marvel has a long record of secrecy. Reuters and AP News have noted in past coverage that the studio often hides major reveals until late in the marketing cycle. Even Spider-Man: No Way Home trailers hid two returning Spider-Men, despite many leaks.

The idea of an early trailer is unusual. But Disney has used cross-promotions before. Strong December box office crowds also make Avatar a powerful launch partner.

What the Trailer Could Mean for the MCU

Fans expect Avengers: Doomsday to follow events shown in several recent Marvel films. Thunderbolts* ended with the Fantastic Four traveling toward Earth-616. First Steps ended with the abduction of Franklin Richards. These scenes appear to set up the main conflict of Doomsday.

Another major shift is the arrival of classic X-Men characters in the main MCU timeline. Marvel has teased that these heroes will have a key role in the film. Actors who played Magneto and Professor X in earlier films are expected to return. This adds weight to the idea that Doomsday will be a major crossover event.

Superhero films have had mixed results this year. But titles like Superman and Fantastic Four: First Steps performed well enough to keep interest high. A trailer for one of Marvel’s biggest films could help boost the studio’s momentum going into 2026.

The Avengers: Doomsday trailer rumor has given fans hope for a major reveal. Many now watch for any sign from Disney or Marvel. The main keyword “Avengers: Doomsday trailer” remains central to rising interest.

FYI (keeping you in the loop)-

Q1: When could the Avengers: Doomsday trailer be released?

Reports suggest it may appear with Avatar: Fire and Ash. This release is set for December 19. Marvel has not confirmed this yet.

Q2: Is Robert Downey Jr. playing Doctor Doom?

He appeared as Doom in a post-credit scene for Fantastic Four: First Steps. His face was not shown. A trailer could offer the first full look.

Q3: Why would the trailer launch with Avatar?

Both films are under Disney. Avatar brings large crowds during the holiday season, which helps exposure.

Q4: How does the X-Men fit into Avengers: Doomsday?

Marvel has teased that classic X-Men members will appear. This may mark their full entry into the MCU timeline.

Q5: Are these details confirmed?

No. These reports come from Collider. Disney and Marvel have not made any official statements.