I personally wouldn't want a WWII Total War game, especially since the premise of total war was never to recreate one specific war but to give you the context to shape history as you and all that. the combat would just not be fun to me, and there are already dedicated WWII strategy games that would blow total war out of the water. and what kind of infrastructure could we build? these are already established huge cities where it just is not logical to be building basic buildings.