They do this every Spring. I'm not saying it won't escalate- with Trumpo in charge there's more chance than usual- but chances are it'll die down.
I do think the regime's reign is coming to an end sooner rather than later, but it'll be China that do it, not the US.
If the regime do get taken down then (assuming we are all still alive) it'll be a massively interesting period seeing what happens. It's too late for a properly united Korea, and having China and South Korea share a border could be troublesome too, considering the US is such a huge ally of theirs.
I'm just rambling. It's late.