I guess PC Gamer UK's next issue leaked, and it features a cover story about CoH 2. Set on the Eastern Front this time.
You can actually see scans of every page of the story if you want to : http://imgur.com/a/67xoi
Actually, you can zoom in and read it, too. :D
Sounds like snow won't just be window dressing. Deep drifts can swamp tanks and slow down men, but it can also be used to help conceal movement around the flanks. Smoke can be used for more concealment. A fog of war system obscures the players view and only lets you see what your men can see.