Yeah, Korea would be awesome. Get myself a F-86E10 with a 6/3 Wing!! Oh man, no MiG could get me.
But an American high altitude bomber DLC? Meh, I could go either way really. It would be fun at the beginning because you wouldn't know what to expect, but after awhile of seeing some B17 with half a tail missing, and even more damage limping back home!? That might get a bit tedious.