The new trailer was played twice for the audience at CinemaCon on Thursday.

Avengers: Doomsday trailer reveals first look at Robert Downey Jr.’s supervillain

The new trailer was played twice for the audience at CinemaCon on Thursday.

By Nick Romano

Nick Romano

Nick Romano is a senior editor at ** with 15 years of journalism experience covering entertainment. His work previously appeared in Vanity Fair, Vulture, IGN, and more.

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April 16, 2026 7:45 p.m. ET

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Robert Downey Jr. will play Victor von Doom in 'Avengers: Doomsday'. Credit:

Michael Buckner/Variety via Getty

Doom has arrived!

Marvel unveiled the first look at Robert Downey Jr. in the CinemaCon trailer for *Avengers: Doomsday*, marking the Iron Man veteran's return to the MCU — this time as supervillain Victor von Doom.

The trailer opens with the sign for Xavier's School for Gifted Youngsters covered in rubble. Charles Xavier (Patrick Stewart) cowers in fear as he sees a huge fire out of his window.

We then see Downey's Doom in profile, with his green cloak covering part of his face. Later, we see Chris Hemsworth's Thor swing his ax Stormbreaker at the villain, who casually stops the attack with the palm of his hand. This moment gives us the first clear, dead-on look at Doom's iconic metallic mask.

"I've fought with many warriors in my time who are far stronger than all of us put together, and they died. They died facing enemies and threats that scared me far less than this one," Thor narrates in the trailer. "Everything that they sacrificed will be for nothing if we do not stand together. Put aside your petty squabbles. And presume nothing except this. If you return, you will return as brothers and sisters. But mark my words: we're going to need a miracle."

Robert Downey Jr. unveiled as 'Avengers: Doomsday' supervillain at Comic-Con 2024.

Jesse Grant/Getty

We see a new-and-improved Avengers Tower with a red "A" logo, where the Fantastic Four meet Bucky Barnes/Winter Soldier (Sebastian Stan), Sam Wilson/Captain America (Anthony Mackie), and Scott Lang/Ant-Man (Paul Rudd). In a separate scene, we see Namor (Tenoch Huerta Mejia) on the throne as he interacts with Wakandans Mbaku (Winston Duke) and Shuri (Letitia Wright).

Gambit (Channing Tatum) later fights Shang-Chi (Simu Liu), knocking a few of his rings off his wrists.

There's also a scene where Mystique (Rebecca Romijn) fights Yelena (Florence Pugh), and the shape-shifter adopts the former Black Widow's appearance as they battle.

Back at the F4/Wakandan/Talokanil meetup, Sue Storm/Invisible Woman (Vanessa Kirby) appears to be using her force fields to hold back something massive. In a separate scene, we see the same shot of James Marsden's Scott Summers/Cyclops letting out a massive optic blast that was previously seen in a teaser.

The trailer ends with Thor seeing his hammer being summoned to another person nearby: a bearded Steve Rogers (Chris Evans). "Hey, pal," the super soldier says.

"It's not possible," Thor says in disbelief.

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The character was teased in a post-credits sequence at the end of last summer's *The Fantastic Four: First Steps*, though the camera never showed the actor's face beneath the green cloak. That film further teased Doom's arrival when a camera panned across the United Nations to reveal a vacant seat for the country of Latveria, the character's home turf.

Downey's Doom, first announced at San Diego Comic-Con in 2024, is the latest Thanos-level threat for the comic book characters of the Marvel Cinematic Universe, one that will span the multiverse. Figures from different realities will mingle together, including members of the X-Men, when the film arrives in theaters Dec. 18, 2026.

The Downey/Doom reveal follows four teasers that screened in theaters before *Avatar: Fire and Ash *and were later released online. The first confirmed the return of Evans as Steve Rogers, despite the actor's earlier insistence that he would not come back. The second featured Hemsworth as Thor and Hemsworth's daughter, India Rose, as Love, the god of Thunder's adopted daughter.

The third gave us the first look at former *X-Men* stars Stewart, Ian McKellen, and Marsden back in action as Professor Xavier, Magneto, and Cyclops. The fourth and final of those early teasers then delivered a meeting of the Wakandans, Talokans, and Fantastic Four with Shuri, Namor, M'Baku, and Ben Grimm (Ebon Moss-Bachrach).

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Joe and Anthony Russo, the brotherly filmmaking duo who gave us some of the MCU's biggest hits (*Captain America: The Winter Soldier*, *Captain America: Civil War*, *Avengers: Infinity War*, *Avengers: Endgame*), are back directing *Doomsday*, as well as the follow-up *Avengers: Secret Wars* (Dec. 17, 2027).

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