Xemnas's Intentions (Secret Ending Spoilers Included)

[Kleith]

Moreover, Braig was here when they found Terranort's body, who was DRESSED LIKE HIM and had the exact same haircut... He had yellow eyes and said he was called Xehanort before collapsing. So unless Braig is really stupid, he already knew it was Terra's body.

Several months later (long hair), Braig comes to see Terranort and calls him "Master", and notices something strange with him (I assume, no more yellow eyes ?) and says "No way... You are... Terra ?!"

So obviously there is something here. It's not just MX.