Thanos (the rumored Avengers villain) cannot logically have the Infinity Gauntlet in the Avengers Film.
-Thor takes place after Ironman 2, which is implied via post credits scene.
-Nick Fury begins to form the avengers after Ironman.
-The Avengers unite under a common threat (told in the Avengers teaser)
-In Thor, which is post Ironman, the Infinity Gauntlet was still safe in Odin's vault.
So if the Infinity Gauntlet, is in Odins vault post Ironman, and the Avengers are united by a common threat, and the Avengers were being formed after Ironman, then logically the common threat cannot be Thanos with the Infinity Gauntlet, because it would be chronologically incorrect.