Board Thread:Questions and Answers/@comment-25051789-20140627020827/@comment-24479616-20140627021851

True. His bankai was 'designed' by Zangetsu (Yhwach), who thaught 'oh well, i have to make this authentic so that Ichigo doesn't suspect im actually an evil Quincy, so lets make it look like the 'Ban' from 'Bankai' so that everyone will believe it is a Bankai'. Also, it could be a variation of the Quincy cross that Yhwach likes so much :3