At the end of the day, Kim isn't going to give up his military ace (nukes) if he believes that this decision has even a 2% chance of deposing him as the leader. At the end of the day, he knows that he's a monster for what he's done to his own people, and so does everyone else. As the citizens of the DPRK catch wind of how bad they've had it, they're going to want to kill him like the Libyans did Gaddafi or the Iraqis did Saddam. He will demand stability for his regime until the dust settles, assuming a deal goes through at all.
Edit: I don't envision a future where we are able to depose of Kim, which would probably be what we all would want in an ideal world. Since that's off the table we are left with a few options: A) We have a more friendly, impotent Kim. B) Put Kim back in his box, isolating him from the rest of the world. Either the regime crumbles eventually (maybe not in Kim's lifetime), or something else significant happens that alters the political landscape.
Good post. Kim will never give up his nukes. He may say he did, but he won't. Kind of like the Israelis and their nukes. The few nukes NK has will be well hidden. Any movement done at night to prevent satellite photos. NK has atomic bombs only, no thermonuclear ones. That is a whole different technology which they are definitely years away from. Probably no more than 20 bombs at the 15 kiloton range. Rudimentary bombs, big, which means it will not fit on a missile or a plane.
I don't think the guy is in any danger of being deposed. It is a dynasty and he is considered to be 'godlike' to his people. Like the Japanese emperor after WWII. Remember that Mao Zedong killed 78,000,000 Chinese during the 'Cultural Revolution' from 1966 to 1976. Not an enemy or war, but his own people. The Chinese consider him a hero. The Soviet Union went through something similar with Stalin and he too was considered a hero.
Libya and Iraq would be doing fine if both Gaddafi and Saddam were alive today ruling their country. Both countries have gone to shit without their dictator. Democracy does not work in all cultures. We Americans have always failed to learn that. Brazil is another example of that also. The country has gone to shit in the last 40 years. The government is corrupt, the politicians are corrupt, and the culture is corrupt. Russia has also gone through its own problems after 'glasnost' and 'perestroika'. The culture has become corrupt and we now have Putin trying to bring his country and people back in line to the glory days of the old Soviet Union.
Kim should stay in power. NK without a strong leader will most likely default to what Libya and Iraq have become today. Some terrorist group will step in to fill the vacuum and control the nuclear weapons. A new NK that will spread its wings into terrorism (ISIS), hostage takeover, but still under the protection of their nuclear 'cloak'. Pakistan has so far managed to do ok (150 nukes), but I consider them more of a threat than a nuclear armed Iran or North Korea. A corrupt country, government, and culture. They run a nuclear 'black market' of sorts. Sale to the highest bidder.
We do not have the details of the agreement Trump and Kim signed. From what I understand it is vague, broad, and open to interpretation. Kim wants to move NK into the 21st century. The U.S. wants to get rid of any potential war with South Korea or use of nuclear weapons. I think both countries have gained something through the summit and the agreement. Too early to tell... Seems like the Trump, Kim and Rodman combination has worked. All three getting along with each other. I think Rodman has played a bigger part in this matter than most people give him credit for. I think Kim loved the idea of traveling outside of NK, I expect he will be doing more of that.