I agree that the title is probably about Belle and Ethan Embry’s character.
I like the theory that the new character is the Wizard of Oz. Oz was definitely an outsider (being from Kansas and not Oz), so it would make sense. But if it is revealed that he’s Oz, then what does that make Belle? Dorothy? She does know a “cowardly lion” (Rumpel,) and Rumpel has shown a particular interest in the ruby slippers.