Board Thread:General Discussion/@comment-4161952-20130801170712/@comment-11051098-20130921120153

If we see Aizen more now, it could be as another, complete flashback from his chat with Yhwach. We have just briefly seen a pic of him from Muken as Yhwach mentioned that he visited Aizen.

Otherwise, if he should manage to escape (and I wonder how, that place is supposedly top-security) it could be that he would try to kill Yhwach and take over his progression to annihilate SS, and rather turn that into his 2nd attempt of killing the Soul King.

But in the case of the latter, I think he would meet quite some resistance and difficulty. Maybe Aizen is immortal, but Yhwach would probably be very difficult to kill even for him, and I do believe Yhwach could very well be the victorious.

As a side-note - it would have been interesting to see Aizen go up against Äs Nödt and be infected with its fear inducement. It would be awesome to see someone who's implied to have no fear at all, have to fight some kind of fear.