My hope is North Africa, 1942. They already have the desert assets, there are famous battles, popular generals and noteworthy divisions. It also plays to the engine's strength's (tank warfare.) This could be expanded with the American Op Torch Landings all the way to the fall of Tunis and thus Fortress Italy. It's a perfect fit!
I could also see a Finnish Continuation War Module for CMRT, but that would be A LOT of forest battles. Also, perhaps Battle for France 1940, but I've heard Steve say that early war wasn't viable.
But plz oh plz give us North Africa!