Imagine, if you will, a scenario where the Soviets and Americans help liberate the Korea Peninsula, but the Soviets take notice of the South Chinese Sea... Knowing that the Soviets wanted to have access to a warm water port for their existence, they then decide to go and take the South for their own, as well as the Americans take notice of the rich coal fields in the mountains of the North?
What if, the South then becomes Communist due to the help of the Soviets, and then decide to attack the North, and invade them successfully? The Korean War just goes differently, with the Americans destroying Seoul, rather than Pyongyang...
What would the implications be in such a scenario? Would there be a Third World War after the first one? Would the North be successfully ingrained with Capitalism? Would the South be just as vengeful to the North and the Americans, as the North is to the South and the Americans right now?