Avengers 4

Avengers 4 directors Joe and Anthony Russo have hinted that the time-travel theory speculated by fans on the basis of a few leaked images of the film, could be right. Earlier this month, images from the set of Avengers 4 in Atlanta, Georgia, leaked online, showing actor Chris Evans' character Captain America wearing the original costume that he sported in Captain America: The First Avenger. This led to a speculation that the movie would feature a time-travelling element.