User blog comment:Darchangel 66/Ending for season 11/Plot for season 12/@comment-27464255-20151229124459

Chuck/God will definitely be back this season. I expect Michael to be back too, maybe wanting Dean as his vessel this time instead of Adam, as well as Gabriel and Raphael.

I don't think they'll be done with Amara this season, or at the very least, thet won't be able to kill her.

And I think the 'empty' Billie mentioned in 11x02 will appear, either Sam or Dean will die and get there. I've got the theory that dead angels and demons go there, so hopefully at least some of them will be back.