As F'd up at North Korea is, the problem is what happens when it begins to auger in. The Kim dynasty is the "only" legitimacy the regime really has with the people. If there has been a coup, and there is no Kim member running things, that could and probably will start a full blown civil-war between the Kim supporters and Anti-Kims. And nothing is more vicious then a Civil War. In a country with the, IIRC 4th largest Army/military in the world.
And nukes.
Yeah.
Sadly, hopefully, he's still alive and just sick/hospitalized (rumours are with gout), heaven help us if the opening acts of a coup/civil war are being played out. I got a feeling our lack of leadership in DC will only make whatever is going on over there worse.