I know it won't happen, but I vote for Xion as the playable character in a KH4 tutorial gameplay. But yeah I agree with Ocean's Rage that I rather have the character's get their games. The Kingdom Hearts series is so big now that it would be great to expand the series even further with other playable characters like Xion, Kairi, Roxas, Terra, Aqua, or Ventus etc etc. Sora can still be the main protagonist the Numbered Title game, but I think it would be cool to have a Birth by Sleep or Dream Drop Distance type of game on the PS5.