Robert Downey Jr. has been very coy about the possibility of an Iron Man 4 — but maybe everybody's been asking him about the wrong movie all along. According to Variety, Downey Jr. is in talks to co-star opposite Chris Evans in Captain America 3, as part of an overarching narrative that will be very familiar to Marvel Comics fans.
Captain America 3 will follow up on the earth-shattering events of 2015's Avengers: Age of Ultron, which will lay the groundwork for the big-screen equivalent of Marvel Comics' "Civil War" storyline. The story will reportedly pit Iron Man and Captain America against one another as they feud over the Superhero Registration Act, which requires all superheroes to register with the government. Iron Man supports the legislation, but Captain America — who, after Captain America: The Winter Soldier, has more than a few reasons to be skeptical of the U.S. government — refuses to comply.
The "Civil War" storyline is expected to play out over numerous upcoming Marvel movies "for the next seven years" — including characters who haven't been introduced yet, like Ant-Man and Doctor Strange.