I wouldn't be surprised to see China intervene if Kim dies under the claim to preserve stability in the region.
ack-ack
Why would they do that? The Korean DMZ ties down a very Large American military presence.
Just cause they hosted an Olympics doesn't mean they want to join hands at the equator and sing, "give peace a chance". The Chinese are thrilled they have some deranged mutt in NK holding down all those Yank forces that would otherwise be pointed at China.