User blog comment:Xilinoc/Ch. 547 - Peace from Shadows/@comment-1268838-20130904145545/@comment-8669536-20130904192655

I'm not saying that Seireitei has been destroyed. But everything was switched except for the people, so therefore I think Muken disappears but Aizen's left.

Kubo said that he wanted Aizen to return so I think Aizen will come back.