China will do the deed....and there will be no war....China and Russia troops on both borders just show China still wants to control what happens in Korea....China will take over governance either with their people or choose who they want. But the old guard will be “taken care of”...one way or another...and Kim shuttled off to some unknown country for the rest of his days.
Yes, I think China is more concerned with that survival, then interested in supporting North Korea. Same with Russia. The they will both play mischief if they can, but I think that is a very thin opportunity, that could quickly hurt them both very directly.
So...the real question is: whose turn is it to babysit the little riceball in Pyongyang? China’s or Russia’s?