Quote (Charity @ 11 Sep 2012 05:14)
better question why is this dude a threat as opposed to aizen. i think he used 1 slash before going bankai on this juha dude but he underestimated aizen enough to just go shikai?
I thought it was understood that Aizen was afraid to fight Yamamoto which is why he sealed away his zanpakuto. It's still unclear whether or not Yamamoto would have been a match for the evolved Aizen that Ichigo fought.
His bankai is ridiculous...