It's not going to be Russia, I can tell you that much. I still to this day believe that the US is going to nuke North Korea and China is going to counter-nuke us, while South Korea will take the opportunity to launch a full-on offensive
That is, of course, assuming that North and South Korea haven't come to terms by then
if china sends out nukes, a few of them will be aimed at south korea though.
and to be honest, i don't believe either china or the us will enter a hot war over the koreas either. there will be hostility, a cold war even, but that ought to be it.
as for russia. they ought to have as little interest in nuklear warfare as the rest of the world and putin, as dictatory and terrible as he is otherwise, should be calculating enough to just keep on rolling his course without causing a nuklear war either. they'll definitely attack more regions though.
but knowing our trump, for him, the entire russia, syria and basically any level of foreign policy, is successfully finished up with that recent missle strike. cause thats the type of idiot he is. it wouldn't surprise me if within a month, he's going to sell this missle strike as an actual war the us won in syria. 'many people say the us never won a war so swiftly! trump won a war, can you believe it? cnn didn't believe it' and then some more rambling.
he didn't do that to punish assad (there's been countless gas attacks in the area people know about in the last years, this one wasn't crossing the red line, it was the one that coincided with a panicked trump), he did that to distract, as always, hoping that it will gain him a few % of public support.