Avengers: Doomsday trailer breaks records six months before release

The trailer for Avengers: Doomsday has set a new record as one of the biggest trailer launches in cinema history, arriving six months before the film's release. The movie reunites returning Avengers with the X-Men and features Robert Downey Jr. as Doctor Doom. The massive response comes seven years after Earth's Mightiest Heroes last appeared together on screen.