Most popular movie franchises in history

Furious 7, the latest instalment in the Fast & Furious film series, is the highest grossing film of 2015 so far, propelling the franchise into billion-dollar territory. The Marvel Cinematic Universe series of superhero films, including Iron Man, The Avengers and Thor: The Dark World, is the most successful movie franchise in history, having grossed nearly $ 3 billion at the box office.