User blog comment:Xilinoc/Ch. 538 Standing On the Edge/@comment-8295743-20130522175405/@comment-1351982-20130522184504

I am going to put an end to this right here. Kubo has stated numerous times that there are only two forms of a Zanpakuto, Shikai and Bankai. There are some Bankai that are stronger than others, but there is no third form or "zenkai." I think it's possible that Ichigo will have a true Bankai and will find his own power instead of using Zangetsu as a "human shield."