User blog comment:Soulreaper1234/Who should fittingly kills Aizen in the end?/@comment-1769234-20100606220730

Thanks, @Lemursrule. Well, maybe Orihime will erase Aizen from existence. Another theory that when Aizen and Ichigo clash again in the real Larakura town he tries to make the oken and its power is to much for him and it destroys him.