I certainly hope they do bring Jack back. Geoff Johns never really had a handle on Jack of Hearts, Intergalactic Space Pimp™. Johns' characterization of Jack was wildly inconsistent; one issue he was comic relief, the next issue he's suicidal, the next issue he supposedly can't think of a reason to be an Avenger, etc., etc., ad nauseum. Johns having him suicide regressed Jack back to canon from 1984. It'd be awesome if one of the cosmic books decided to use him. (You hear me, Abnett & Lanning? Bring him back and get him laid, because poor Jack's been c-blocked by his own superpowers since 1976.