Sorry if this has been done before...

So looking up stuff on Birth by Sleep as well as currently playing through KH2 right now. I've been intrigued by the mystery behind who Xehanort is considering how several of the Secret Ansem Reports make it a point to mention it. Now, Birth by Sleep has a new group of heroes battling against a "Master Xehanort" and partly deals with the character Terra's battle against the darkness in his hearts (this is assuming the trailers are not edited in a way to throw off players concerning the plot which highly possible).

KHII:FM has several new scenes that talk about Xemnas' having a private lab where he speaks to someone. There is a cutscene later that shows Xemnas entering Ansem's old lab in Radiant Garden that ends with Xemnas speaking with a piece of armor that surprisingly looks like the one worn by Aqua in the Birth By Sleep secret ending.

We know Xehanort knows Aqua and he did experiments on himself concerning the darkness in his heart. My theory is that Xehanort may perhaps be Terra (possibly possessed by Master Xehanort or his apprentice). Thoughts?