While Avengers: Age of Ultron will have the Marvel superhero team fighting side-by-side to protect the human race, it will also build up to the Civil War storyline for Captain America 3, which pits Iron Man against Cap.
The feud will be caused by the Superhero Registration Act that the government introduces. The act is supported by Tony Stark/Iron Man but strongly opposed by Captain America.
It will be interesting to see how the popular Civil War storyline from the comics plays out on the big screen. The film is slated for release on 6 May, 2016 so there's a possibility that fans might get to see the film's first look in the form of a teaser trailer around May 2015 – maybe it will release alongside Avengers: Age of Ultron which opens on 1 May.
Meanwhile, check out these really cool fan-made posters for Captain America 3: Civil War.
And here's one featuring Spider Man as part of the film - although it has not been confirmed, but strong rumours suggest that Spidey may join the cast of Civil War.