Master Xehanort is just his recompleted self. I think Vanitas is reformed by the negativity from the screams in Monstropolis. Xion is unclear. Sheâ€™s using a new Replica body like the time travelers and they never show her present day heart leaving Sora, but sheâ€™s never forced to return to the past either. I figure itâ€™s a plot hole.