So hear me out. This is a Warhammer Fantasy End Times alternate scenario.
What if, instead of the setting being wiped out and Age of Sigmar rolling into town, at the 11th hour the Gods of Law returned to smack the Gods of Chaos in the face, driving them back to the wastes?
How would the nations of the Warhammer World react to the arrival of 'good' warp gods that just saved their world? What would a Deamons of Law army look like?
Well, considering Skaven have depopulated most of the world anyway, I don't think there'd be much of a reaction at all.