If a Korean War version comes out that would mean finally having to make the B29, so it will never happen.
Aside from that it would also have a pretty sparse planeset compared to WWII. Obviously the attraction would be mass jet vs. jet combat but that might prove to be more of a novelty in the long run and turn more into all the jets BnZing all the poor P51s, F4Us, and F80s. Basically what we have now, just fewer planes to choose from. But if a Korean War arena did appear one day, I would sure as hell give it a shot.