I think if Neal is Bae, there will be fireworks when he shows up in Storybrooke.
Here’s an interesting quote from Bobby:
CARLYLE: The stuff that’s coming up, that I’m just about to do in the next three or four episodes, is mind-blowing. It just takes it somewhere else again. I was like, “Oh, my god!” You actually will feel sorry for Gold. There’s his love for Belle and he’s trying to be a better man, but we’ll see how long that lasts.
That was in recent interview (in which he was promoting his new movie). So…if Neal's coming back in episode 14-ish, which some fans guessed from MRJ and K&H…I guess that gives Rumple/Gold three or fours episodes to do really unspeakable things, particularly with the arrival of Hook and Cora. I'm thinking Bae is going to show up at the worst possible time. And it breaks my heart a little.