There are probably small scale things that North Korea might request behind closed door, but ultimately, North Korea would be speaking things like a peace treaty with the United States and South Korea.
Administration feel that a peace treaty is the kind of concession that should come near the end, after North Korea has already given up a substantial share of it's nuclear arsenal.
Years later, the king of the Netherlands agreed to decide the dispute. The king said it was impossible to decide the border from words of the peace treaty between Britain and the United States.
But in a poll released in November, it showed that 74 percent of Russians are against a transfer of territory even if that does mean a peace treaty with Japan.