Kingdom Hearts 4, the next chapter in Square Enix's long-running Disney-collaborative epic, should be arriving at some point in the next few years. When it comes to speculation and hype surrounding Kingdom Hearts 4, it's only natural to wonder about which IPs the game will loop into its grand, universe-hopping narrative. Certainly, KH4 could balloon vaster than ever before, with a multitude of new worlds to explore, but revisiting one staple franchise should be on the to-do list.