User blog comment:Lia Schiffer/392: The Breaking Glaciers/@comment-1248963-20100214050820

I've already explained why the switch in itself is absurd. Aizen was having thoughts during the last moments of 391 that involved things that Momo didn't know: Sakanade's power. And Momo was as stunned as everyone else when she found herself stabbed into Toshiro's blade, she had no idea she was there or what on earth was happenning, so there is no way she could be the one fighting the captains (again, she couldn't have blocked Soifon's Nigeki Kessatsu or match their speed)