Just to clarify, when I said the Gauntlet I was referring to the superhero named The Gauntlet, who has a piece of alien tech on his arm that gives him superpowers. Not the Infinity Gauntlet.
Gauntlet was first introduced in a flash-forward cameo in Slott's SHE-HULK run but didn't make his proper debut until AVENGERS: THE INITIATIVE where he was part of the ensemble cast, and he is currently a supporting character in Slott's IRON MAN run.