America gets involed for no reason. They fuck some shit up then claim they are "liberating", Europe soon follows then we steal everything from NK and run off back to our countries leaving North Korea and South Korea completely destroyed. ALLIES, FUCK YEAH.
South Korea micros the shit out of North Korea and spams marines until the North Korean macro can't sustain and eventually ggs. In all seriousness, I have no clue what is going to happen next.
If NK does a major attack on SK, China ditches NK because there is no way in hell that china is gona stick with a rouge state like that and risk everything, Hell Iran has more cooth than NK. After NK attacks SK, the world will prettymuch destroy them, least the leadership because the world is sick and tired of NK going "We got nukes we all powerfull hail the leader of a starving nation while he appoints his overweight son"
The north is always lobbing stuff at the south, just to remind them that they're still alive, sort of. A few months ago they sunk a SK ship killing many SK sailors, it isn't anything new.