Michael Eisner, head of Tornante, said he was interested in bringing the show back when it ended. I can envision Raphael and everyone playing in this world again. As of now, I think it is unlikely to happen in the near future, but I think it is a possibility and might happen, but it might not happen either. Certainly, the show was not as commercially slaughtered with merchandise and tie-ins as Ricky & Morty was, so it seems there is some artistic integrity there, I trust they would only brig back this universe if they had a story to tell.