User blog comment:Xilinoc/Ch. 576 - THE KILLERS HIGH 2/@comment-5693502-20140409100933/@comment-5398287-20140410063917

I'm thinking "Exposed to the Wild", which is apparently one possible rendering of the supposed kanji, is referring to the Shikai's appearance and to Kenpachi; one's a chipped, jagged sword, and the other has a very wild look about him, plus that scar and such.