It would have been interesting to show the Koreans using a nuclear-pulse orion dive to get there ahead of the other teams, in the most quick and dirty way possible, but there would have been no hiding them launching nukes astern of their ship.
Even in our own timeline, NK would be the only country I could imagine trying it
Might have been interesting, but the thing that made it hard for me to buy was, very simply -- where was he getting his food and water?