Board Thread:General Discussion/@comment-4976518-20140808063123/@comment-27120885-20151026024132

my theory if he did have one: it's a bankai where everyone hallucinates, and where the hallucinations come true. Also, everyone's worst nightmares come to life. Also, you cannot defeat the hallucinations and nightmares unless you render Aizen bladeless. Aizen would still have his illusion shikai abilities intact.