Reasons why I think he will:
-In the movie The Avengers Thanos makes his first cameo appearance.
-The Infinity Gauntlet made its debut appearance in Guardians of the Galaxy (the gems).
- INFINITY WAR IS THE STORY LINE OF THANOS AND THE AVENGERS BATTLING.
IF YOU DIDN'T KNOW WELL THE AVENGERS 3 Title is Infinity War.
-Its time for him to make another appearance.
But do you think he should make a second appearance?
Do you think it'll be confirmed soon?