I wish somebody would just hack the ROM and pull out the renders of mysterious Xehanort guy and find the render of the secret boss.
Because I doubt we keep seeing this mystery guy just for him NOT to be Xehanort in a completed form and NOT the secret boss.
The music seriously goes back to all of the clues we got in FM+ and 358/2 Days and in BBS.
**Xemnas is looking for Chamber of Waking. -----> Destati = Awake.
**MX and Terra are Xehanort the Apprentice. -----> Fate of the Unknown = BBS
**Random Xehanort looking back who appears twice. Once in the opening and the second time with Tera's glimpse into the future. He was looking at both his and Riku's future. Terra becomes Xehanort which becomes Xehanort's Heartless. Riku has XH inside of him.
**We know that the first secret boss was Xemnas
**The second secret boss was Lingering Sentiment
**Music + Clues + Facts + Obviousness = Most likely Xehanort.
But this song is amazing!