Iron Man and Captain America

Although he’s said there will be no Iron Man 4, Robert Downey Jr. is reportedly in negotiations to return as Tony Stark in Captain America 3.

According to Variety, Iron Man will play a key role in the film, which will usher in the “Civil War” storyline from Marvel universe and help set up a new phase of movies from Marvel Studios. The actor is said to be in final negotiations for the third installment of Captain America, which is slated to begin production in Spring 2015 for a May 6, 2016, release.

Downey is already on board for next summer’s The Avengers: Age of Ultron, as part of a previous inked deal that will also see him return to reprise the role of Iron Man in The Avengers 3.

If you’re not familiar with the “Civil War” story line, and if it goes along with the way it’s played out in the comics, Tony Stark will be Cap’s rival, 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.

While Stark supports the program, Rogers does not, saying it threatens civil liberties. Sides are taken and Captain America, along with others, are forced to go on the run to avoid arrest.

The storyline could see Downey return in future Marvel films, including a fourth Avengers, writes Variety.

Additionally, Marvel announced Monday (Oct. 13) plans to reboot the Civil War comicbook miniseries in 2015, helping introduce the story to new readers leading up to Captain America 3. A tweet shows both Captain America and Iron Man tugging at a version of Spider-Man wearing a suit Stark built for him, referred to as Iron Spider-Man.