Doubt it. Idk where the absorbing the Spirit King thing came from lol , but Ichigo has been going to life or death situations for awhile now and not once has anyone saw fit to warn his friends of his possible death til now? Not buying it. Shunsui came to the world of the living with purpose, I think he's trying to make sure the Gote 13 is at full force before they goto War.
the 4th and 8th squads are vacant, Ichigo and Love are presumably the only two with Bankai level. I'm sure Hiyori will be Ichigo's Lt. for comic relief. Just my 2 cents.
I would think they'd want to bring Yoruichi as well, along with the former Captain of the Kidou Corps Tessai - i'd absolutely love to see him in battle doing all kinds of epic kidou spells and stuff…