Board Thread:General Discussion/@comment-4976518-20140808063123/@comment-24384892-20140809195120

I can't imagine someone as powerful as Aizen not having a Bankai. Aizen is someone who has transcended the boundaries of Shinigami and Hollow. It's unthinkable that he would not have a Bankai, something that countless Shinigami "lower-leveled" than him have.