No. I say that even thought the Korean War never officially ended and the two have a desire to reunite.
It can go two ways. The young dictator needs to posture a bit from a position of strength to his military. If not, a military coup is likely to happen. In the end, nothing happens. This has been the pattern set by his grandfather and carried out by his father before him.
Second is if this young leader makes aggressive strikes against the South, Japan and/or American territories nearby (which his military is currently capable of technologically), North Korea will become a chapter in history. After great losses, especially in the North, the Korean War will come to an end finally and will reunify.
China has grown considerably economically and I doubt will stand in the way. China has more to lose than gain by keeping it's Stalinist cousin. In fact, I think they'll participate in taking care of the North Korean annoyance. John Kerry needs to do his job (which he really hasn't) and work with the Chinese to hammer out contingency plans.
We're again witnessing an American short sightedness here. Instead of stirring the pot in the mid-east and creating more instability, the United States should be aggressively dismantling remnants of the Cold War: providing for a homeland for the Palestinians, Syria, parts of Africa and of course, the Korean peninsula. The United States needs to rapidly stop in creating puppet and despotic foreign governments. America needs to walk her talk.