User blog comment:Sicarius001/Royal Guard and Eighth Division Captain/@comment-8295743-20130419183206

If Unohana really did die(I'm holding on to dear bloody life that healers got to her first), I assume Kisuke Urahara or Tessai Tsukabishi would be approached by Shunsui for the position of Fourth Division Captain. Both seem highly proficient in medical Kido. Isane is good, but not nearly good enough to take over as head of the Medical Relief Division.

I haven't the foggiest idea of what Senjumaru and Osho created for the Soul Society. Oh, and the above quote you used is in reference not to the Senkaimon, but rather the doors to the SRDI, I believe.