User blog comment:Soulreaper1234/Urahara says Fusion Aizen says Subdue/@comment-1857369-20100508132131

I'm going to agree with Salubri and Lia on this one. I don't think Aizen fully understands what he has gotten himself into due to his limited amount of time with the Hogyoku vs Urahara's century worth. Plus it's Urahara's nature not to reveal everything he knows and given his time with the orb he probably knows something vital that Aizen doesn't.