User blog comment:Xilinoc/Ch. 575 - THE KILLERS HIGH/@comment-24765906-20140402122007

So here is my theory. Kenpachi's shikai ability, or maybe even his bankai's to an extent is to manipulate his opponents into fighting him. That's why the kid looks like he's gone insane with bloodlust all of a sudden and why he doesn't simply imagine Kenpachi dead (Because he wants to prolong the fight, much like Kenpachi does.)

I imagine the ability will be explained in a manner which lets Kenpachi impose his will on those he fights. Giving them the same drive as Kenpachi, thus making his fights more enjoyable as his enemies are going all out. When you think about it, it's the perfect ability for Kenpachi.