If it isn't already out there, I'm claiming this "speculation about aizen" blog.
I also want to point out my thoughts about his likelyhood of dying soon:
He is one of the few anime characters who claim themselves as God,
The others are just as popular as him, which are Light Yagami of Death Note,
And Pein, of Naruto. Both of which died, so I can see his death in the near future.
This is not the only subject, so feel free to post about other Aizen based theories.