An exciting new beginning, indeed!
I'm getting the feeling that they might be setting him up as the Norse God's (former?) champion, so if Asgard is saved, I could see him appear on earth.
Deadman is a cool guess, but I think the person is somehow connected to the Olympus or the afterlife realms as a whole. Deadman seems too low-key to me.
Blue Snowman is getting lots of action lately.
I hope you are right about the rogues. Would fit with what Conrad said in the latest interview that there are a lot of things happening in the background.