Produced by Marvel Studios and directed by Anthony Russo and Joe Russo, Avengers: Infinity War brings together multiple Marvel characters as they confront the threat posed by Thanos. The film stars Robert Downey Jr., Chris Hemsworth, Chris Evans, and Josh Brolin. It is based on Marvel Comics characters and is part of the Marvel Cinematic Universe.

Från IMDB:
The Avengers and their allies must be willing to sacrifice all in an attempt to defeat the powerful Thanos before his blitz of devastation and ruin puts an end to the universe.