"Avengers: Infinity War" Watch 1st trailer for upcoming Marvel movie

In the upcoming superhero movie, the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to collect the Infinity Stones.

If you thought that the cast of "Captain America," with its two opposing sides of superheroes was huge, "Avengers: Infinity War" is about to deliver at least twice the cast.

The movie features almost every main character from the Marvel Cinematic Universe to date.

"Avengers: Infinity War " debuts May 4 and is directed by Anthony and Joe Russo, who helmed "Captain America: Civil War" and "Captain  America: The Winter Soldier."

"Avengers 4" follows on May 3, 2019.