Avengers Doomsday: Release Date, Cast & the World Series Preview

Marvel is taking Avengers: Doomsday to the World Series. On October 22, MLB’s official account announced that fans would get an “exclusive preview” of the movie during Game 1 of the 2026 World Series on Friday, October 23 — a crossover moment that put the next MCU epic back at the top of everyone’s search box. Here is what the movie is, who is in it, and what to expect from the new footage.

The World Series preview

Game 1 between the Tampa Bay Rays and the Milwaukee Brewers started at 8 p.m. ET on FOX, and Marvel’s special look was expected to air somewhere during the broadcast — most likely during the seventh-inning stretch, when the biggest TV audiences are watching. Marvel did not say exactly when the footage would drop or what format it would take, and the studio warned that the preview might not appear online immediately after it airs on TV.

Separate rumors claimed a full trailer would arrive on the morning of October 23, but Marvel has never confirmed that, so treat it as speculation. What is confirmed is the World Series spot itself, announced by MLB’s official channels.

What is Avengers: Doomsday?

Avengers: Doomsday is the fifth Avengers film and the next big MCU crossover, arriving in theaters on December 18, 2026 — about two months after the World Series preview. It is directed by Anthony and Joe Russo, the brothers behind Avengers: Infinity War and Endgame.

The film throws heroes from three different universes onto a collision course: the Avengers, the Fantastic Four, the X-Men, and the Wakandans, all facing a threat unlike anything they have fought before — Doctor Doom, played by Robert Downey Jr. in a brand-new role. Marvel’s own framing of the villain is simple: Doom wants to rewrite the multiverse in his own image.

Who is in the cast?

The confirmed cast keeps growing, and the teasers have done their share of shocking reveals:

• Robert Downey Jr. returns to the MCU — not as Iron Man, but as Victor von Doom, the main villain.
• Chris Evans is back as Steve Rogers, confirmed in one of Marvel’s four hero-focused teasers.
• Anthony Mackie continues as Sam Wilson, the new Captain America.
• David Harbour returns as Alexei Shostakov, the Red Guardian.
• Winston Duke is back as M’Baku of Wakanda.

Marvel has released two full-length trailers so far, plus four shorter hero-focused teasers, and each one has trained fans to comb through every frame for clues.

The promos leading up to the preview

Marvel has been running an unusual global promo campaign. Earlier in October, a promotional video filmed at Spain’s Alcazaba fortress in Málaga showed Mackie, Harbour, and Duke alongside five unidentified hooded figures in green robes — which fans immediately theorized could be the Black Swans, a mysterious group tied to Doctor Doom in the comics. Marvel España released that clip on October 17.

A few days later, a new promo aired in partnership with the NBA. And Marvel’s online countdown clock — which changes in ways that have lined up with real announcements before — started glitching right after the World Series spot was announced, sending fans into another round of speculation. Marvel has not commented on it.

What comes after Doomsday?

Avengers: Doomsday is the first half of a two-part story. It leads directly into Avengers: Secret Wars, the film expected to close out the current MCU saga. Rumors about the plot — including leaked theories about Steve Rogers, a branched timeline, and Doom’s hunt for Rogers — are exactly that: rumors. The safe move is to wait for December 18.

FAQ

When does Avengers: Doomsday come out?

December 18, 2026, in theaters everywhere.

What was the World Series preview of Avengers: Doomsday?

Marvel aired a “special look” at the film during Game 1 of the 2026 World Series on October 23, announced by MLB’s official account. The exact timing during the broadcast was not announced in advance.

Who plays Doctor Doom?

Robert Downey Jr., in a new role — he is not returning as Iron Man.

Is Chris Evans back in the MCU?

Yes. One of Marvel’s hero-focused teasers confirmed that Evans returns as Steve Rogers in Doomsday.

Who directs Avengers: Doomsday?

Anthony and Joe Russo, the directors of Avengers: Infinity War and Avengers: Endgame.

What is Avengers: Secret Wars?

The planned follow-up to Doomsday, expected to conclude the MCU’s current multiverse saga.