Board Thread:Spoilers!/@comment-5094906-20141119193942/@comment-24674051-20141120050638

As for people coming out of the Hat, I would imagine that the Sorcerer probably has the power to do exactly that. It is HIS (or HER) hat, after all. And that may be very well what we see, when the Sorcerer shows up. He takes his hat back, restores Killian's heart, and has a face off with Rumple, who retreats to lick his wounds. (Just speculation)