WARNING - DO NOT READ UNLESS YOU HAVE READ THE LATEST MANGA CHAPTER!!!
OMG! OMG! I TOTALLY forgot! I TOTALLY DID! HOW could I have FORGOTTEN! It's SO OBVIOUS! WOW! NEW THEORY POPPIN' UP!
Ok, here goes nothing:
HITSUGAYA DIDN'T WANT TO KILL AIZEN, AND AS SUCH HIS ATTACK AUTOMATICALLY DIDN'T KILL AIZEN! IT WAS ALL PART OF
AIZEN'S PLAN (I think). Remember the conversation Hinamori and Toshiro had in anime episode 126: In which Momo asks Toshiro if he
is going to kill Aizen. Hitsugaya would never hurt Momo, and he knows that by killing Aizen he would hurt her. He is going to watch the turn
of events but he will not kill Aizen himself. So either the one he stabbed wasn't Aizen, and he knew that, or he didn't stab Aizen where he
could've killed him. (theory - watch it, I don't know if I'm correct!)
Also, who was the one who came up with the Aizen-Gin swap? If so, that is another theory I strongly support. Momo herself said in this
episode (126) it could've been Gin. Therefor I consider it highly possible.
Furthermore, I still like my own theory (Aizen's Bankai being Creation - creating new lifeforms or copies of lifeforms) because it would mean
Ichigo didn't kill the actual Ulquiorra (ULQUI COME BACK =)) and which would mean the Espada are less disappointing then they were now.
even though this is highly UNlikely, because it would mean Nel is a copy too bla bla bla to complicated bla bla bla...
That's it for now. Just wanted to share. =)