-The "destroyed" Organization XIII members return as their complete beings.
-The Six apprentices return ti Radiant Garden to reclaim the castle and wreak havoc.
-Lea and Isa return their too but their is tension between them.
-In order to stay close to Roxas, Lea befriends Sora and the gang and becomes the world ally during gameplay.
-We learn the true names of Demyx, Luxord, Marluxia, and Larxene.
-The Lingering Sentiment become s a world ally for the Keyblade Graveyard.
-Castle Oblivion is "revisted".
