I dont see that the picture you paint for the furure is any different to how things are now. In any future war, as the recent wars in Iraq and Afghanistan, the US will provide the wests major componant, however europe (the rest of nato) will still be able to provide a considerable presence although likely it would be a major combined/multi cultural effort.
To steer this towards the subject of any game set 2015 onwards lets say, i still think BFC would want to add the major nato players (france, england and germany to name a few)
I certainly believe though that even if its decided that European forces would not be realistic in a real life conflict, i believe it would be a sensible money making prospect (not to mention good for BFC's countless loyal customers) to add such content.
After all, every one of the combat mission games is one we all want to have as much content for as possable.
(Cos its more addictive then crack)