I doubt that will happen, there are too many historical and ideological differences. But the over-riding reason is the cost of such a move. Some calculate the cost to be as much as three trillion dollars.
fts: So do I, but I am looking at a best outcome, like the reunification of Germany. Which financially and philosophically still is a project in progress. The trillions spend on this are peanuts compared to the cost of keep this people apart, fighting each other.
The west (UN) called the repelling of the NK invasion a "police action" . A truly all out effort, no holds barred conflict like ww2, would not have ended in a stalemate.
So, I wish the Korean people well, a peaceful future, what a waste to be ready to commit suicide over who is going to rule.