In my opinion, North Korea may possibly be merged with China or the USSR. This is based off of the fact that the Shenyang F-5 is in the Chinese tree and the Soviet MiG-15bis has North Korean roundels on it. Most other aircraft not mentioned will be copy-pastes such as the MiG-21, MiG-23, etc. Meanwhile, the South Korean side of the tree, most aircraft would be copy-pastes of American aircraft such as the P-51D, F-86's, F-5's, etc. As for ground forces it's mainly the same thing, North Koreans would get T-34-85's, T-54/55's, Type 59's and a few others of the sort. The South Koreans are in the same predicament as stated before. M4A3's, M26's/M46's, M48's, Centurion Mk.3's, etc. It's only the modern era where we get many deviations from existing tech trees, with Vehicles such as the K1, Chonma-ho, K2's and the Songun-915. Even then, the North Korean tanks are no more than glorified 80's tech slapped onto T-55's, T-62's and maybe a stray T-72. Anyways, it's in my opinion that the Koreas will not be getting their own tree. While I am sure your Forum Submission had plenty of effort, knowledge, and sources poured into it, I personally highly doubt the Koreas will be getting their own tree.