I've seen a theory that wish Robin was actually pulled from the past and that had Regina gone into the tavern when Tinkerbell took her there, this is the Robin she would have met, that this is what he would have been like had Marian and Roland not been part of his life. The only purpose I could see to it would be to show that Robin and Regina wouldn't have been right for each other then and real Robin was right when he said that things happen when they're supposed to. That would also explain why wish Robin didn't age like everyone else in the wish realm, if he came from a different realm and a different time.
Or they could do something awful like completely destroy the soulmate connection, say Tinkerbell was wrong or she was lying or who knows. I wouldn't put anything past them at this point.
