Board Thread:General Discussion/@comment-24970687-20140531231739

Do you think that there was anything stopping him from using his Bankai on Aizen? In my opinion, when Aizen had stabbed Yamamoto and he could confirm that it wasn't an illusion, given the knowledge of Aizen's intellect and the assumption that Aizen would not face Yamamoto directly without some sort of trick, Yamamoto had the perfect chance to completely destroy Aizen. Also, i think it's worth mentioning that Wonderweiss was intended to seal Ryuujin-Jaka and contain it's flames, though in my opinion Aizen couldn't have possibly designed him to handle Zanka No Tachi. 