Marvel Studios has released the first full trailer for Avengers: Doomsday, giving fans their first proper look at Robert Downey Jr. as Doctor Doom. The two-minute, 25-second trailer premiered on the studio’s Doomsday Clock livestream on YouTube and confirms a theatrical release of December 18, 2026.
Quick answer: The trailer dropped on July 20, 2026, runs 2:25, and shows Downey’s Doctor Doom facing the Avengers, X-Men, and Fantastic Four, with Chris Evans’ Steve Rogers returning while holding Mjolnir. The film releases December 18, 2026.
Where and when the trailer released
The full trailer went live on July 20, 2026, timed just ahead of San Diego Comic-Con. It marks the same footage first shown to theater owners at CinemaCon earlier in the year, now available for everyone to watch. The clip announces that Avengers: Doomsday will be the first MCU film presented in Infinity Vision, Disney’s newest large-format screen technology.
You can watch the official trailer below.
Doctor Doom’s first look and design
The trailer opens with Professor X inside the X-Mansion, watching an explosion erupt outside, before cutting to the first clear shot of Doctor Doom’s armor and mask. Downey’s Doom wears a green and silver suit with a matching hood and cloak, plus a mask that leaves his eyes visible so the actor’s expressions still read through the metal. The look draws heavily on the character’s modern comic-book depiction.
Doom’s power set gets an early showcase. In his standout moment, Thor charges at full force and Doom stops both the god and Stormbreaker with a single raised hand. A rune visible on his glove hints that the MCU version wields both advanced technology and magic, matching how the villain works in the source comics.
Downey played Tony Stark for a decade before the character died in Avengers: Endgame in 2019. When he first appeared as Doom at CinemaCon, he walked out to the Rolling Stones’ “Sympathy for the Devil” and said, “I couldn’t have imagined reuniting with this amazing team — let alone as a new character.”
Every major reveal in the trailer
The trailer packs several crossover moments as heroes from three universes converge on the New Avengers tower to prepare for Doom’s multiversal threat. Here are the key beats.
| Moment | What happens |
|---|---|
| Opening | Professor X sees an explosion outside the X-Mansion, leading into Doom’s first reveal. |
| Hero clashes | Shang-Chi (Simu Liu) duels Gambit (Channing Tatum); Yelena Belova faces Mystique (Rebecca Romijn). |
| Loki’s return | Loki (Tom Hiddleston) appears in his classic TVA suit, seemingly escaped from the TVA. |
| Team-up | Thor, the original Avengers, and the Fantastic Four gather to warn of the coming threat. |
| Doom vs. Thor | Doom stops Thor and Stormbreaker with one hand, showing his strength. |
| Final shot | Steve Rogers returns wielding Mjolnir, surprising both Thor and longtime fans. |
Other heroes glimpsed in action include Shuri, M’Baku, Namor, Cyclops, Magneto, Ant-Man, Falcon, the Human Torch, and the Invisible Woman. Marvel Studios president Kevin Feige has said the film picks up where Avengers: Endgame left off and finally brings the Avengers and X-Men into the same movie.
Why Steve Rogers holding Mjolnir matters
The trailer’s biggest surprise is its closing shot. Chris Evans’ Steve Rogers, who retired to the past at the end of Endgame, reappears alongside Chris Hemsworth’s Thor and lifts Mjolnir once again. That reunion stuns Thor on screen and carries added weight because Sam Wilson’s Falcon now holds the Captain America mantle in current MCU continuity.
Speaking after the footage screened, Evans described Doom simply: “This guy — I don’t like it.” Director Joe Russo framed the villain as “not simply a villain — one of the most complex Marvel characters. He’s always three moves ahead.”
Cast, directors, and release date
Avengers: Doomsday unites the Avengers, X-Men, Fantastic Four, and Thunderbolts in one film. Anthony and Joe Russo direct from a screenplay by Stephen McFeely and Michael Waldron, with Kevin Feige producing. The trailer notably does not feature Spider-Man or Wolverine.
| Detail | Information |
|---|---|
| Release date | December 18, 2026 |
| Doctor Doom | Robert Downey Jr. |
| Returning Avengers | Chris Evans, Chris Hemsworth, Anthony Mackie, Tom Hiddleston, Sebastian Stan, Paul Rudd, Letitia Wright |
| Fantastic Four | Pedro Pascal, Vanessa Kirby, Ebon Moss-Bachrach, Joseph Quinn |
| X-Men | Patrick Stewart, Ian McKellen, Rebecca Romijn, James Marsden, Kelsey Grammer, Alan Cumming, Channing Tatum |
| Directors | Anthony and Joe Russo |
| Format | First MCU film in Infinity Vision |
The film opens the same weekend as Dune: Part III, with the follow-up Avengers: Secret Wars currently dated for December 17, 2027. For now, the trailer sets the stage for Doom as the Multiverse Saga’s central villain and confirms exactly when the crossover arrives in theaters.