According to Screen Rant, Robert Downey Jr. is set to return to the Marvel Cinematic Universe — not as Tony Stark, but in an entirely new, recast role across several upcoming MCU films.
The Biggest Casting Mystery in Marvel History
For anyone who grew up watching Downey define an era of superhero cinema, this news lands somewhere between thrilling and surreal. Tony Stark's arc ended definitively with Avengers: Endgame, and Marvel isn't walking that back. Instead, the studio is betting that Downey's magnetic screen presence can anchor a completely different character — and honestly, that's a fascinating creative gamble. The question that's already consuming every corner of the internet is obvious: who is he playing?
The leading fan theories have coalesced around a few heavy hitters. Doctor Doom is the most electric possibility — a villain of operatic ambition who could anchor the MCU's next decade the way Thanos did its last. Others point to a variant or legacy character that lets Downey's familiar face carry deliberate in-universe weight. Whatever Marvel has planned, this is the kind of casting puzzle that the fancasting community lives for.
What myCast Fans Are Already Building
The myCast community has been busy constructing their dream versions of the MCU long before this announcement dropped, and those stories are now a fascinating lens through which to view the Downey news. Across two active fan-cast stories — Marvel Cinematic Universe and Marvel Cinematic Universe — fans have been reimagining the franchise's core roster from the ground up.
Interestingly, both stories share some strong consensus picks. Alexander Siddig appears as the top choice for Ho Yinsen in both versions, and Reese Witherspoon earns votes for Christine Everhart across the board. Perhaps most striking: fans in both stories have cast Ben Affleck as Tony Stark — a choice that makes you appreciate just how irreplaceable Downey's original performance feels, and how bold any recasting conversation becomes. A third story, , takes a more Spider-Man-centric approach, with fans slotting back into the Peter Parker role and making some inspired swings like as Uncle Ben.