What are all Marvel movies with Thanos in it?
Here is a list of Marvel Cinematic Universe films in which the character Thanos makes an appearance:
 1. The Avengers (2012)
 2. Guardians of the Galaxy (2014)
 3. Avengers: Age of Ultron (2015)
 4. Avengers: Infinity War (2018)
 5. Avengers: Endgame (2019)