Board Thread:General Discussion/@comment-10587310-20130620071127/@comment-11051098-20130703182534

If he does, maybe Kenpachi and Ikkaku will dislike it so much that he has to switch squad. Although that sounds ridiculous.

But if Shûhei achieves or has achieved Bankai, and at some point gets promoted to captain of the vacant Squad 8, Yumichika could perhaps become Lieutenant of said squad if Kenpachi kicked him out because of his "real" Shikai.