User blog comment:Tinni/Kurosaki Isshin/@comment-1454424-20091116041440

Kenpachi's are killed and the last Kenpachi died in the middle of Seireitei in front of 200 witnesses. Unless you are suggesting Isshin can do hypnosis, he can't be 11th squad.

Also, the Ichigo and Ganju interaction is just part of Ichigo's personality. It doesn't mean anything. I think that Kubo just wanted to use the black haired Ichigo he drew for the pilot and thus was born Shiba Kaien. I don't know how much more Kubo wants to explore the likeness but I would point out that no one has commented on Ichigo looking like Kaien since Soul Society arc. So that part of the story thread seems to be abandoned.