Board Thread:General Discussion/@comment-6057702-20130909154101/@comment-5551986-20130909163708

I doubt he would have to learn Bankai again, it will just have a new form. The nature of Zangetsu never changed, Zangetsu was and always will be his Zanpakuto, just because its power is no longer restrained wouldn't mean he has a brand new zanpakuto. In a way I see it is like having a constant line going horizontally which would be the true Zangetsu. When Quincy Zangetsu stunted Ichigo's growth he created an offshooting parallel line adjacent to his original powers which would be the powers he had for most of the series. Simply when Quincy Zangetsu stopped doing that it caused the lines to become one again. Its similar to a meander and oxbow lake or a diverted route I suppose. In my opinion anyway.