Well we know that in the video promos that we see Regina tied to a lamp post and Emma swinging a pretty good looking sword. So it could be Regina. As for people’s theories of Rumpel and Belle I think now. I say this because these are major characters. Without Rumpel there would be no mayhem and mischief. For Belle, well she was confirmed that she’ll be in a next episodes; at least one of them. I think it would be too too early to just get Belle (Rose French is her name in SB), out of asylum and kill her. I believe that it can’t really be a major character; I’m thinking more along the lines of supporting or minor characters. We know August is sick so I think it would be him. But then again if I were the writes I would let him died because everyone will think it has to be him, So… Who’s it going to be? (Not Rumpel or Belle I hope. They have to be together in SB! They just have to! 😥 )
I believe that how they are going to end this season is where Emma is going to take a swing at Regina and everything will then blackout and say “To be continued”…. It would defiantly get the crowd rallied up.