At the D23 Disney Entertainment Showcase, a new trailer for Avengers: Doomsday was unveiled.
Here is the kicker for pop culture fans and box office watchers alike: Marvel is betting on the actor who launched its cinematic universe, transforming the face associated with Tony Stark into Doctor Doom.
The Bottom Line
- The Big Reveal: Robert Downey Jr. stars as Doctor Doom in a multiversal clash that bridges three separate worlds.
- Creative Heavyweights: Directors Anthony and Joe Russo return to the franchise alongside writer Stephen McFeely.
Unpacking the Multiverse Crossover and Legacy Returns
The D23 footage bridges cinematic eras by assembling a sprawling roster that includes Thor, Ant-Man, Shang-Chi, Loki, Yelena Belovová, the Fantastic Four, the Wakandans, Namor, and the Thunderbolts.
According to comprehensive reporting from Knihy Dobrovský, the trailer pulls the classic X-Men into the narrative. Patrick Stewart reprises his role as Professor X, Ian McKellen returns as Magneto, and James Marsden, Rebecca Romijn, Alan Cumming, and Kelsey Grammer step back into their roles. Channing Tatum repeats his role as Gambit, in which he first appeared in Deadpool & Wolverine.
The Structural Economics of Reversing Tony Stark
Cast changes and legacy cameos are standard procedure, but weaponizing Robert Downey Jr. is a gamble. For over a decade, audiences associated his face with heroism, sacrifice, and humor. By casting him as Doctor Doom, Marvel uses a face associated with the birth of the Marvel cinematic universe for a new role.
| Creative Element | Details / Talent Confirmed | Strategic Impact |
|---|---|---|
| Directors | Anthony and Joe Russo | Brings back the directors of Captain America: The Winter Soldier, Captain America: Civil War, Avengers: Infinity War and Avengers: Endgame. |
| Primary Antagonist | Robert Downey Jr. as Doctor Doom | Subverts franchise history by repurposing the MCU’s founding hero as a villain. |
| Major Crossover Factions | Avengers, Fantastic Four, X-Men, Wakanda | Merges disparate cinematic universes into a single narrative collision across three realities. |
| Surprise Comebacks | Chris Evans as Steve Rogers (alongside Anthony Mackie) | Re-engages original continuity anchors while maintaining the current roster’s status quo. |
Navigating the Return of Steve Rogers
Since the conclusion of Avengers: Endgame, in which he passed his shield to Sam Wilson, Anthony Mackie has served as the current Captain America.

The D23 footage clarifies that both actors will populate the cinematic landscape. Given that the plot hinges on the clash of three separate realities, the door is open for alternate timeline variants or other possibilities.
What Comes Next for the Marvel Cinematic Universe
The Russo brothers are stepping back behind the camera with a clear mandate: surpass the stakes of previous crossovers by threatening multiple universes rather than just Earth or half of all life.