Board Thread:General Discussion/@comment-13475854-20140214111644/@comment-5051564-20140214170956

I don't think the details of your theory are correct, but Wicked could be both Regina's and Snow's half-sister, if Cora and Leopold are the parents. I thought the reason they will bring Cora back is to show the origins of Wicked. Then I heard Leopold will also be in the episode, so I think he has something to do with it too. (Or the episode could be more Snow-centric and tell about the past of Snow's parents and the part that Cora played in it, in that case it has nothing to do with Wicked).

I don't really like the idea of Wicked being the half-sister of Regina and Snow. I hate that every new big character suddenly is a part of the family tree. It's a little annoying. Snow and Regina being related to eachother because of Wicked could be interesting though...