it will probably go the way of ww1
i think
You mean where we have an arena with only four planes dogfighting? with one plane clearly superior to the other three its basically a one plane dogfighting arena. If that's all it stays then your comment might have merit. time will tell, but I hope HTC grows the heck out of it. Great idea great, nuclease of a concept, but arguably not the best choice of rides for introducing a new era arena.
Lastly, yes. A Korea Arena is a foregone deal. Its just a matter of time before they run out of believable things to add to WW1 and WW2 eras.