Originally posted by the ninjak
Well Sephiroth would have to watch Aizen release it. There's no reason him not to watch his opponent unsheathe his sword during a battle.
Not to mention Aizen is ALWAYS already in Shikai pretty much so... I don't see him releasing. Which is why I think he'd die. But his Kido would be pretty wicked. It would challenge Sep's magic.
Originally posted by the ninjak
Why can't Aizen in this fight just use his Shikai anyways regardless of later anime feats?
Because he said it's Aizen in his first stage of the hok. and at that point aizen wasn't shikai'ing anyone. he was getting flicked through buildings by Isshin. Even if he took it like a champ.