Board Thread:General Discussion/@comment-24382631-20140110234616/@comment-30811407-20140111041303

Aizen did state that he didn't fight Yamamoto because he would have lost, but of course, neither ever used Bankai against each other. I think that would have greatly influenced the fight.

I think Yamamoto could probably cut down all but the final form in a single hit. After that, I think it would take more than one strike.