User blog comment:Xilinoc/Ch. 650 - THE THEATRE SUICIDE SCENE 4/@comment-24574959-20151105100214/@comment-5398287-20151110011705

The comparison to Kenpachi's situation is inaccurate, Curt - Kenpachi took an Asauchi off a dead Shinigami, so he still imprinted his own soul on it and made his own Zanpakuto. He simply wasn't able to communicate for so long because he never tried and didn't care to.