There is a different future that is available to North Korea, if they choose differently.
The other countries did not share the same concern the United States had in the early '90's - that North Korea actually had an ongoing nuclear weapons program.
Now North Korea certainly is located in a different place geographically, but I think it faces the same type of strategic decision. Does it want a different future for its people?
Any agreement that you have isn't going to be based on North Korea's intentions or trust.
And I think they realize that the other five countries are lined up against them, because all five are opposed to North Korea having nuclear weapons.