This is HUGE
Robert Downey Jr. is set to be in Captain America 3, which could mean that the next storyline may be based on the epic comic book mini-series, Civil War.
The deal is significant for the Marvel cinematic universe considering the plot will pit Stark against Captain America’s alter-ego Steve Rogers, played by Chris Evans, as they feud over the Superhero Registration Act, which forces anyone with superhuman abilities to reveal their identities to the U.S. government and agree to act as a police force for the authorities.
Stark supports the program, but Rogers does not, saying it threatens civil liberties, causing sides to be taken and Rogers, among others, to go on the run to avoid arrest. The moral question and battle with his Avengers teammate essentially makes Stark a villain of sorts in “Captain America 3,” providing Downey with a meaty role he could play out into future Marvel films, including a fourth “Avengers.”
If this comes together, Marvel will rule the comic book movie-verse.