Board Thread:General Discussion/@comment-24749544-20140329111822/@comment-4957813-20140330151930

Yes, and for the reasons we outlined, it is impractical to use in battle, you need concentration on the sword, not the opponent to manifest the spirit. Plus, using Bankai involves bringing the spirit to the physical world. Thus, if the spirit has manifested, I do not think the user can actually use Bankai.