First there was Combat Mission: Battle for Normandy, then there was Combat Mission: Red Thunder and now there is Combat Mission: Final Blitzkrieg. I think that Both CMBN and CMRT combined contain most of the opponents fighting each other in Europe during the Second World War. In the Combat Mission: Final Blitzkrieg base game there is only US Army, German Heer, German Luftwaffe, and German Waffen-SS present. I sure hope there will come an addon, or addons, to the Final Blitzkrieg which makes all the other armies present too?
There was of course also Combat Mission: Fortress Italy. But as the Italians had surrendered by the time of CMFB that game isn't included above.
I've only played the demo to Final Blitzkrieg and will soon play the demos for the other three WWII games. But I already feel that if there will be an addon, or addons, to Final Blitzkrieg, which gives the buyers of the game access to the major armies, there will be opportunities to make custom made scenarios similar to the most interesting and fun scenarios from CMBN, CMFI and CMRT.