User blog comment:Soulreaper1234/Urahara says Fusion Aizen says Subdue/@comment-1937164-20100509173652

First off, let's all retract our steps back to the time Ichigo went to save Rukia in Soul Society. Was Aizen-sama not researching the books left by Urahara Kisuke-sempai, which in my own knowledge was compiled and putted together by Urahara. To me Urahara has the very, very best of knowledge of the Hogyouku. No matter how intelligent Aizen is, the creator always knows about what he created and they will have that spiritual bond, one way or the other. If Urahara-sempai says it's fusion, so it is.