The first trailer for Avengers: Doomsday has reportedly leaked online, and it serves as an introduction to Captain America yes, he’s back.

The trailer opens with a shot of someone riding a bike, who appears to be Steve Rogers, the original Captain America. He parks the bike and enters a house that fans will immediately recognize from Avengers: Endgame, where Steve was last seen living a peaceful life with Peggy Carter.
The next scene shows Captain America holding a baby. Shortly after, the screen cuts to black, revealing the “Doomsday” logo along with a countdown, hinting at something massive on the horizon.
If you’re wondering about the storyline, Avengers: Doomsday is said to be a direct sequel to Avengers: Endgame. Marvel reportedly plans to release four separate trailers for the film. This leaked footage is believed to be the first teaser.
According to reports:
The second trailer will focus on Thor
The third trailer will introduce Doctor Doom
The fourth trailer will be the full, extended trailer
All of these teasers are expected to be attached to Avatar: Fire and Ash screenings.
Cast of ‘Avengers: Doomsday’
Avengers / Main Heroes
Chris Hemsworth – Thor
Anthony Mackie – Captain America (Sam Wilson)
Sebastian Stan – Bucky Barnes / Winter Soldier
Paul Rudd – Ant-Man
Letitia Wright – Shuri / Black Panther
Simu Liu – Shang-Chi
Florence Pugh – Yelena Belova
Wyatt Russell – U.S. Agent
Danny Ramirez – Falcon (Joaquin Torres)
David Harbour – Red Guardian
Hannah John-Kamen – Ghost
Winston Duke – M’Baku
Fantastic Four
Pedro Pascal – Reed Richards / Mr. Fantastic
Vanessa Kirby – Sue Storm / Invisible Woman
Joseph Quinn – Johnny Storm / Human Torch
Ebon Moss-Bachrach – Ben Grimm / The Thing
X-Men
Patrick Stewart – Professor X
Ian McKellen – Magneto
Alan Cumming – Nightcrawler
Rebecca Romijn – Mystique
James Marsden – Cyclops
Kelsey Grammer – Beast
Channing Tatum – Gambit
Other Key Characters
Tenoch Huerta – Namor
Tom Hiddleston – Loki
Lewis Pullman – Sentry
Robert Downey Jr. – Doctor Doom
Avengers: Doomsday is scheduled to release in theaters in the United States on December 18, 2026.