Over time, the Avengers lineup has come to include characters like War Machine, Scarlet Witch, Vision, Falcon, and Spider-Man - but it all started with the Big Six. Feige said, "We wanted to bring to a conclusion a series of movies in a way that had never been done before". He said just like Harry Potter, Lord of the Rings, though the story was ended still they launched a new book regarding the ending. "We look at the trailer as a very different experience than the movie, and I think audiences are so predictive now that you have to be very smart about how you craft a trailer because an audience can watch a trailer and basically tell you what's gonna happen in the film".
With phase four set to begin after Endgame, Marvel might be adding newly acquired Fox Studios' content, that includes Fantastic Four and X-men.
Avengers: Endgame opens in theaters April 26. Civil War saw the group split, with Cap and his crew heading off into exile in the aftermath. At the very end of the official Avengers: Infinity War trailer, fans were greeted with an epic shot of Captain America, Black Widow, Black Panther, Okoye, Winter Soldier and the Hulk leading a Wakandan army into battle.