Although Avengers: Endgame saw Tony Stark/Iron Man sacrifice himself to defeat Thanos once and for all, fans have speculated actor Robert Downey Jr. might return at some point down the line for a cameo or as an A.I., much like he did in the comics. However, Endgame director Joe Russo has made it clear the actor won't return any time soon.
In an interview with ComicBook.com, Joe said, “Tony’s dead, you know? That’s it for Robert. He’s done.”
Joe's answer seems quite definitive, meaning it's unlikely actor Downey Jr. will appear again as Tony Stark any time soon, which isn't shocking considering his death. There's a lot of speculation at this time as to who -- if anyone -- might end up suiting up as the next Armored Avenger.
The Russo brothers previously confirmed actor Chris Evans, who plays Steve Rogers/Captain America, is also done with the MCU and unlikely to appear again any time soon. Sam Wilson, to whom Rogers passed his shield, will presumably serve as the new Captain America for the foreseeable future.
It's entirely possible the actors might indeed cameo at some point in the future, though it's clear it won't be in the near future.
Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Mark Ruffalo as Bruce Banner, Chris Hemsworth as Thor, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Brie Larson as Captain Marvel, Paul Rudd as Ant-Man, Don Cheadle as War Machine, Karen Gillan as Nebula, Danai Gurira as Okoye and Bradley Cooper as Rocket, with Gwyneth Paltrow Pepper Potts, Jon Favreau as Happy Hogan, Benedict Wong as Wong, Tessa Thompson as Valkyrie and Josh Brolin as Thanos. The film is in theaters now.