User blog comment:Lia Schiffer/418: Deicide 20/@comment-1439341-20100902200959/@comment-1712587-20100903072250

i don't think Aizen will be using KS or any Bankai abilities. Aizen has stated numerous times since his fight with Isshin that he has surpassed his Shinigami self. this should have meant that Aizen was above using any Shinigami powers at all and i think his use of bakudo 90 was put to highlight his desperation and frustration at ichigo overpowering him. i could imagine him screaming Bankai in a last ditch effort just as his time is up a la the grimmjow final outburst but i doubt he even has a shikai or Bankai to speak of anymore since that is "beneath him"