How about an event focused on the Korean War? In air RB limit it to Sabres and Mig-15s, in ground it would work too. The Korea map exists and a lot of us would sure like to reminisce about the old days when Mig-15 and Sabre were top dogs. It could be even rated, one of the prizes could be a rare camouflage on Mig-15bis - Red 23, just for example.