Yeah, there is a bit of tricky overlap, as the Market-Garden date brings you into the initial battles all along the West Wall, but the terrain and art needed for those overlaps more with the Battle for the Bulge. I kinda suspect we will see a lot of West Wall content (Ardenne/Hurtgen forests, more fortifications, German towns, industrial buildings etc., fall/winter textures) held for the Bulge, but that both titles will have some date overlap.