Can we really assume the DLC to come is indicated by the icons here - where's Burma Road for example?
Given that DLC is always focused on a campaign for just one side and is sometimes very niche (Winter War), I would expect a bit more than is indicated here. For example, would Liberation include all of North Africa, Sicily and Italy from the US side as well as Overlord, Market Garden, the Bulge, and the end of the Western front - seems unlikely (especially with core unit carry over).
I wonder if there is also scope for more specialist campaigns like Kreigsmarine, maybe a campaign that focuses on the strategic bombing campaign.
I guess the development roadmap is also a very long one - the game has been out for over two years and there's still a huge amount of potential content for Western Europe (I assume the Pacific theatre is now complete), so maybe another 2-3 years of DLC to come.