VIDEO: The debate behind Captain America Civil War
The film all hinges on a fight between the superheroes we've come to know and love over the issue of registration. In the wake of the massive destruction of two Avengers movies, the government is trying to put in place measures to track and control super powered people. Iron Man is in favour of this, Captain America not so much.
That's all going to set up some seriously emotional content for the film, as well as some repercussions for these characters and the wider Marvel universe. And you can get an idea of the story behind it in this viral video.