The Avengers: Doomsday teaser trailer, that was exclusively attached to Avatar: Fire and Ash in theaters last week, has now been officially released online:

The brief trailer picks up with Chris Evans‘s Steve Rogers (formerly Captain America) during the epilogue of Avengers: Endgame, when he returned to the 1940s to reunite with his beloved Peggy Carter, revealing he fathered a child before reemerging as an old man in 2023. In the comics, Steve adopted a son named Ian, but whether this will also be the name of his MCU counterpart remains to be seen.

Given the trailer’s length, and what The Hollywood Reporter has said about the next clip(s), we can assume more minute-long teasers revealing other characters will be attached to Fire and Ash, and arrive online in the coming weeks.

Marvel Studios also dropped the teaser poster for the film, revealing what appears to be a Latverian version of the window that once belonged to Loki‘s He Who Remains:

Avengers Doomsday teaser poster

Avengers: Doomsday, directed by Joe and Anthony Russo, will be released in theaters on December 18, 2026, and see the return of Robert Downey Jr., albeit as lead villain Doctor Doom instead of the late Tony Stark/Iron Man. It will also feature Anthony Mackie as Sam Wilson/Captain America, Chris Hemsworth as Thor, Danny Ramirez as Joaquin Torres/Falcon, Paul Rudd as Scott Lang/Ant-Man, Simu Liu as Shang-Chi, Letitia Wright as Shuri/Black Panther, Tenoch Huerta Mejia as Namor, and various lead cast members from Thunderbolts*, The Fantastic Four: First Steps, and the original X-Men films.

It will be followed by Avengers: Secret Wars, due out December 17, 2027, and be preceded by Spider-Man: Brand New Day (which doesn’t have a trailer yet) on July 31, 2026. In the meantime, the MCU will continue on Disney+ with Wonder Man (releasing in its entirety on January 27), Daredevil: Born Again season two in March, a Punisher special, and VisionQuest later next year. Marvel will also expand on the cinematic Fantastic Four’s past in First Foes, a new quarterly series debuting this March, which may or may not include Downey’s Doom.