User blog comment:Xilinoc/Ch. 570 (I can't think of a witty title at 11 pm)/@comment-24572618-20140226225829/@comment-10554972-20140227231534

Do you really think that Kenpachi would train for Bankai after he heard his Zanpakuto's voice? I think that Kenpachi will never gain Bankai specifically because he would never train for it. Kenpachi seems like the type of guy who never trains and gets stronger by just fighting, as evidenced by his "training" with Unohana and him hating the training under Yamamoto.