Board Thread:Spoilers!/@comment-1916997-20150313202428/@comment-4839682-20150504031547

It would seem that events aren't done. Think about it: if Regina stayed with Daniel, she wouldn't have cast the Dark Curse. Emma wouldn't have gone through the wardrobe, and Henry wouldn't exist. Henry was in the promo. (of course, he could rewrite things with all the dead dead, and the living living, but still)

Besides, it seems the writer has to follow the laws of magic. It's been said elsewhere that he likely can't undo events, meaning he can't restore the dead. (I prefer it that way anyway)