"It is time, Russia, China and the U.S. sit down and work out a plan to reintegrate N. Korea into the family of planet earth."

Kim could not survive re-integration of NK into the family of planet earth.  Once their people found out what the rest of the world has, there would be an uprising against those who kept them as a hermit and starving state.  Kim knows this, hence his complete control over communication and media.  So he won't be part of that grand conversation.

So what/who would Kim be replaced by?  A democracy?  A different Communist/repressive state?  A theocracy?   War isn't the answer.  Maybe rock-paper-scissors is, best 4 out of 7?