Premise: Thanos . Thanos appears in the Marvel Cinematic Universe 's various films , including The Avengers ( 2012 ) , portrayed by Damion Poitier , and Guardians of the Galaxy ( 2014 ) , Avengers : Age of Ultron ( 2015 ) , Avengers : Infinity War ( 2018 ) and its untitled sequel ( 2019 ) , portrayed by Josh Brolin .
Hypothesis: Thanos has yet to appear in a movie.
Label: CONTRADICTION