Gold wishing he didn’t know who Bae is here does work with the Nealfire theory (since it makes him related to the Charmings and his life all the more complicated), so that checks out. As for Henry–perhaps he has magic like Emma? Oooh–since the Queen had to kill “the thing she loved most”=Henry Sr., to enact the curse, perhaps young Henry must be sacrificed to undo it? After all, if the curse had never happened, Henry never would have come into existence. Then again, I can’t see Disney killing off a kid–so maybe he’s the “key” in some other way?
And as much as I would love to see Hook out of the Axis of Evil, I think it would be much more interesting if it was Regina. Plus, we know Hook won’t give up his chance at revenge.