You could get that anywhere. As stated previously, every square inch of the planet has the potential to be the source of pretendy fun-time games.
The reality of it is what seveng wants to introduce. Yes, Korea has populated the computer screen real estate for an incredibly long time. Although familiar ground is attractive on the surface, all it will do (in the end) is introduce a "who has done it better" comparison between this and Falcon based on the theater alone. I don't see Korea being very business smart even though us (you) Falcon simmers love the peninsula.
I like the suggestion of Iran; it's different. If you look at Iran topographically, it's a rather big playground with an incredible amount of potential for even the smallest amount of imagination.
It's something new. The last "new" sim that introduced a new theater was DCS. Even though ED has screwed up the airports, DCS simmers still love the landscape; a lot of water, mountains, large map overall. Generally, it was a good choice. Imagine if they picked Korea? Yeah, no...let's not.
The middle-east region is always buzzing with conflict, making it a brilliant flagship location. As such, you can (as you suggested Admin) expand/build on from there (similarly in MSFS).
Late, I know...but worth a mention at least.