The cockpit is pure F22.
For Korea we just need 2 new planes
Mig and Sabre we have everything else to make it credible
MiG and Sabre might make it credible, but I think we'd need more to make it successful. Probably under a dozen aircraft would do it though, and maybe 5-6 additional tanks and GVs. I think it'd be way more interesting than the WWI arena, especially with ground and ground support and interdiction operations.
Might even pull me out of WWII arenas if it was set up like the Axis vs Allies arena. Not sure I'd stay too long in a Korean-era MA. I think the scenario team could cook up some great scenarios, too.