Honestly I'm disappointed, very much like the Pacific theater of war. Japan fought against the USSR and the U.S. war against Japan was the perfect binder for the new addition. But again, the Normandy landings, and again the Germans. It would be possible to implement new ideas afibiynoy appliances (And so the war against Japan, the Soviet Union is not very often show in the games),USSR could add Baikal Military District Commanders (marines, paratroopers, the Lend-Lease equipment, a combination of pre-war USSR with the latest technology) and the U.S. Marine Corps, and Japan has a huge scope for Creating Armies. I am very very disappointed.
Dont worry, they will def add japan in the future. western armies is just a start.