Board Thread:Questions and Answers/@comment-14069511-20130731190639/@comment-893506-20130731191557

Most likely, Ichimaru would have been imprisoned. There are several factors as to why:


 * He helped Aizen further his plans behind the scenes.
 * He conspired with Aizen regarding the murders of the previous members of the Central 46. Even if he didn't physically kill any of them himself, he still counts as an accomplice for knowing about it and not telling anyone, and for helping Aizen keep his cover.
 * He openly attacked Hitsugaya and was very willing to kill Momo Hinamori while he was still a captain.
 * He defected with Aizen and Tosen, and continued to help them with their plans of creating the Oken.
 * He stood against the Gotei 13 and their allies when they were fighting Aizen in Fake Karakura Town.

I want to factor the death of the 5th Division's 3rd seat into this (back when Aizen was a lieutenant), but I honestly don't know if anyone found out if Ichimaru killed him.

Even though Ichimaru's ultimate goal was to kill Aizen, he has committed many atrocities in trying to pull it off. Ichimaru is very well dead, and even if Aizen didn't kill him, he would either be imprisoned or executed for his role in Aizen's plans. He is not a hero, and he was not acting to help others (except Rangiku); he was ONLY out to help himself.