You know guys, I have no clue why this isn't being demanded more by the community: a comprehensive DCG.
I wrote this many times already, it will give infinite replayability, it will work with CoD and BoM, you make your own storyline, the game will always be fresh.
New planes, yeah that would be nice, new campaigns, good too, but a good DCG is a must for a game like this.
And as for RoF, it was in the beginning an online game only and only because of the community they introduced a SP career mode, a sort of DCG. They have gone very much overboard with charging for add-ons, not even DLC, just add-ons, such as planes (yes, I consider those an add-on, not real DLC) and little gadgets for your planes, called "field-mods"
I am aware of the community efforts to bring a dynamic campaign to CoD and they are much appreciated, but so far there is nothing in terms of really comprehensive.
I also agree that the devs are quite occupied with other issues of the sim to actually even consider giving us a DCG, what a shame.