Following the events of the Age of Ultron, the collective governments of the world pass an act designed to regulate all superhuman activity. This polarizes opinion amongst the Avengers, causing two factions to side with Iron Man or Captain America, which causes an epic battle between former allies.
Did You Know?
In the Civil War comic storyline, Iron Man was Pro-registration, while Captain America was Anti-Registration. Fan demand has been high for years for a Black Panther film (which will happen in 2017). But the reason Panther is being introduced in this film, is that in the comics one notable hero stood on the fence and was basically caught in the middle of Iron Man and Cap. That hero was Spider-Man, but since Sony owns the film rights to him, it was decided that Panther would take Spidey's place in the storyline. This is not certain, however, as there have been reported discussions between Sony and Marvel Studios to bring Spider-Man into the Marvel Cinematic Universe. See more