Board Thread:Spoilers!/@comment-26159109-20160301190120/@comment-25926288-20160504002514

I'm sort of hoping it's not Jekyll and Hyde and that we're all surprised. I'm actually not sure we'll even get to know who they are by the finale. Maybe if they say their respective names and whether or not it's true (although these characters could be lying).

As spoiler pics and stuff showed, it appears that Henry had a crystal (Olympian crystal?) in his hand before he and Regina (in SB) put it down and potentially casted a spell and then the evil-twin guy showed up.