Control Xion and make him walk into a lava pit. >; )

Have Shuri regroup with the others. Have Uberbob say,"Look, we don't know if Antifoo island is dangerous or not. No one has actually been there, right? Besides, we just defeated an extremely powerful villain; I'm sure we can handle some stupid island!"

Get back in Pandora's Car, regardless of what anyone says, and head for Antifoo Island.