Nothing good will come of this for the US.
First, we know that Trumpy knows nothing about NK's nuclear abilities, nor what we would desire from them in an agreement, nor what we're willing to give up. We also know straight from his mouth that he hasn't done any homework at all on it, and he won't listen to the people that actually do know their stuff on the matter
Second, you have to assume that Kim knows every detail of their program, knows exactly what he wants, and how to get it.
Finally, we know from Trumpy history that it doesn't matter what the deal is, as long as it gets done, and can be crowed about as a feather in his cap. No matter what the deal ends up being, it will be the best deal ever negotiated by the United States.
This idiot will give away the farm to Kim just to get a deal done, and will never even recognize just how badly he got played, and what the repercussions for the future will be.