User blog comment:Lia Schiffer/417: Deicide 19/@comment-2220308-20100828034922

So.... I can think of one possibility of Ichigo not being able to defeat Aizenfly with his flyswatter FGT, despite his amazing facepalm. Think back to when isshin did GT (and everyone went OMG his just did GT) and Aizen (who was more normal and not ridiculous like he is now) commented that he "understood that attack," and then proceeded to destroy everyone somehow. And also remember the 8th espada, and how he was like "even if i've never seen the attack, so long as i've analyzed you (creeper) i can nullify it," when ishida did that megablast steelschneider thingy. So Aizenfly could go "yeah, you're now stronger than me (dang it!) but i can render your ultimate spirit bomb useless since i know you and your attack so well. Hahaha!" And then ichigo gets aizen'ed.

Oh, and i only looked through this blog, so if someone else has already presented this theory, im very sorry, im not ripping you off.....