Being out of phase with time is one of the explanations for Sentry's powers. I wouldn't reccomend going with that.
Adam deserves another star turn, and I like him as the leader of a team book.
Personally, I'd make him the head of an annihilators style team and put him, Surfer, Sentry, Beta-Ray Bill, Hyperion and maybe Gladiatior on it. xD
...and just let them all be *utterly ridiculous*.