User blog comment:Soulreaper1234/Urahara says Fusion Aizen says Subdue/@comment-44061-20100510181128

Now thats a theory. I think alot of use here have been going in that direction. I myself has said Aizen should be more concerned about the hogyoku. It apparently has some form of sentience. If it was that simple to use Urahara would have just used it against Aizen in the first place. Urahara knows something about the Hogyoku, probably not good for anyone.