User blog comment:Xilinoc/Ch. 557 - He Already Set His Life Aside/I Already Threw Away My Life/@comment-9096222-20131113152848/@comment-5398287-20131117235205

While I agree that the second part of your comment would be interesting to see, I'd like to point out that regardless of how powerful Kenpachi may be, he won't magically have attained Bankai simply because he can finally communicate with his sword. A Shinigami needs at least 10 years of training and communication with their Zanpakuto, plus experience, in order to attain Bankai. While Kenpachi may be powerful, he's only been communicating with his Zanpakuto for, what, a day or two now?

And please don't bring up the Tenshintai, the Shinigami don't have 3 days to dedicate to the plot device when they could have Kenpachi wrecking the Sternritter instead.