Thanks to ataros for translation!
Comment to DLC:
Imagine you have bought CloD, with its E-3, E-4 Bfs and Mk I & II Spits etc. Then you go to a server that runs a year 43 eastern front mission. Choose a field. Nope, no planes available, go to online shop to buy them. Ok, I'll go play Skyrim or something
Old series did it real good. But yes, they can leave the UFOs out from the coming theatre packs