I believe they said that they are working on the TOW campaigns now.
I kinda wish they would just make the expansions. Two factions gets very old, very fast.
the WW2 eastern front as the backdrop is rather limited to include new nations, but some variations to either side are possible:
New Faction for Axis - take the current German as the base, replacing some units with Romania or Hungary's.
New Faction of Allies - take the current Russian as the base, replacing some units with Czech or Poland's.