Pretty simple. Only use the information that the manga gave us so far about these two characters. Although we have not yet seen a lot of Aizen's abilities, I think we have enough to predict a winner in this fight. Go!
英雄メンバー / Eiyuu Menbaa / Hero Member
In the New Jerusalem.
Post Thanks / Like
Re: Sosuke Aizen vs Kuchiki Byakuya
Personally, this doesn't really seem like much of a question to me...Byakuya might have a chance with the omni-directional attacks that he has. But in the end it all comes down to spiritual pressure. Aizen has an insanely impossible amount and Byakuya would be matched with bankai Ichigo. Assuming that Byakuya would take the information he has on Aizen's zanpakuto, it would be a good fight. But I think Aizen would remain the winner.
"I pray for the strength to change what I can,
The inability to accept what I can't,
And the incapacity to tell the difference...."
Now this would be a great match to see. But from the kind of power ive seen Aizen display i think byakuya would lose. Im not saying that he would'nt put up a good fight but Azien is so cunning. He likes to toy with people and let them think that theyr are winnig or have won. then he appears and crushes you on sight. Was this evena real question?
This article is more of a point-maker. Personally, I do not believe Byakuya has any chance whatsoever. Ichigo couldn't even cut Aizen's finger and I believe Byakuya would fair the same way. His attacks would not be able to cut Aizen. If Ichigo bankai sword can cut through Form 3 of Byakuya's bankai, but cannot cut Aizen's finger, then Byakuya doesn't have a chance in harming Aizen. If his reiatsu isn't strong enough for that, then kidou will do nothing, his bankai will do nothing.
Furthermore, Aizen overpowered Grimmjow with reiatsu alone. Grimmjow is stronger than bankai Ichigo (no mask) and thus stronger than Byakuya. Aizen could force Byakuya face-first into the ground with reiatsu, then go over and chop his head off. I do not see Aizen even needing to release his shikai.