Granted, but if their pawns lose the battle for the Materium all of their immortality and such doesn't really mean much.
Well it kinda does. I mean the topic is the Long Game and since the Chaos Gods can't loose they must eventually win, right? The Gods can't ever die, everything else in the contest can and probably will so all they have to do is wait.
"Look into my eyes, and see your death."
"Let them hate, so long as they fear."