Not as long as China protects him he won't. For various reasons I don't entirely understand China has elected to keep this family in power.
I thought it was rather obvious. Kim Jong-un and his kin are likely a family line of alcoholics more than happy to just stay drunk and remain too busy having fun partying it up to dare think clearly for a moment and "rock the boat" (just ask Dennis Rodman). Kim is Probably a pushover who is easily persuaded to keep drinking by his admirees. And as long as he's too busy keeping staying drunk, he's not dabbling in more dangerous things things like warfare and nukes. Last thing we want is a family line of stone-cold-sober and power-obsessed critical thinkers at the helm. That could lead to genocide. So I guess we can all give a big thanks to Rodman for sacrificing his time and health to do his part to protect world peace by keeping this overempowered wild-child distracted. Things could be a lot worse.
The reason why worry kills more people than work is that more people worry than work.