User blog:GhostPrincess/Bad Little Boy: Where does Ice King come in?

So I've heard a lot about the new Bad Little Boy episode, where Fionna and Cake come back. Fionna and Cake is Ice King's fan fiction... Where or how does he come into the episode? I have a theory that it will have something to do with Simon Petrikov, but what do you guys think? I'll be happy to hear any ideas!