“There are going to be a couple of guests,” singer Patrick Stump said, opting to keep his lips sealed on the specifics. “I think we're going to keep mum about it for now.” Bassist Pete Wentz explained that though they’ve finished their album, there’s still some paperwork and signatures that have to be signed before clearing the featured guests. “Those are the last things that we're working out,” Pete said. “I don't think all of the contracts have been signed yet. But I will say that if people are excited about the 2 Chainz idea, there's more exciting stuff.”