Marvel has dropped a new trailer for Avengers: Doomsday, which teased the arrival of Robert Downey Jr.’s Doctor Doom, the most formidable foe our heroes have faced yet.

The trailer was shown in the room at CinemaCon as part of Disney‘s presentation Thursday in Las Vegas.

“Something’s coming, something we may not be able to deter,” said Patrick Stewart’s Professor Xavier. “Before this day is done, we will be faced with an unthinkable decision.”

Thor said “we’re going to need a miracle” to bring Doom down — but thankfully, it seems he has one in Steve Rogers (Chris Evans), who returns for the first time since Avengers: Endgame in 2019.

Other Marvel characters we saw coming together in the trailer to combat Doom included Shang-Chi (Simu Liu), Yelena Belova (Florence Pugh) and the Thunderbolts, Namor (Tenoch Huerta) and the Black Panthers, Gambit (Channing Tatum), the Fantastic Four and Magneto (Ian McKellen), to name just a few.

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The latest film in the MCU is set to hit theaters on December 18. It’s directed by the Russo brothers, who were on hand today at CinemaCon, along with Downey and Evans.

Avengers: Doomsday was originally announced at ComicCon 2024 along with the companion Avengers: Secret Wars, two pics that marked the Russos’ return to the MCU. The duo of films made close to $5B at the box office.

A livestream stunt in March 2025 revealed the cast, which includes Stewart as Charles Xavier, Alan Cumming as Nightcrawler, Rebecca Romijn as Mystique, James Marsden aka Cyclops and Kelsey Grammer as Beast from the Fox Marvel movies. The Fantastic Four: First Steps foursome of Pedro Pascal (Reed Richards), Vanessa Kirby (Sue Storm), Joseph Quinn (Johnny Storm) and Ebon Moss-Bachrach (Ben Grimm/Thing) are also aboard.

Additionally, it has Chris Hemsworth as Thor, Anthony Mackie as Sam Wilson/Captain America, Sebastian Stan as Bucky Barnes/Winter Soldier, Letitia Wright as Shuri, Paul Rudd as Ant-Man, Hannah John-Kamen as Ghost, Wyatt Russell as John Walker, Tom Hiddleston as Loki, Lewis Pullman, Danny Ramirez, David Harbour, Winston Duke and the list keeps going.