Well, as much as I want the Med, and believe me I want it badly, The Battle of Moscow does not require
any capitol ships to be modeled.
Note we have no warships of any kind in CloD.
I suspect that modeling at least one battleship type, and cruiser type, and two destroyer types, for the Italian and British navies, and a Royal Navy aircraft carrier with the appropriate aircraft types for it would take a year in and of themselves, not counting any new maps.
I'll bet most of the Russian Front stuff has been done for a long time now.