I think the fact that he likely has a son makes Ju Ae less likely. Just cause she's the first to be introduced, does it mean she'll take over? Anyways, if he passes anytime soon there will likely be a power struggle and I reckon this market needs more criteria to deal with it. What if half the country is controlled by one person and the other half another? Or if someone is considered leader for 1 day but doesn't have much power before someone else takes over, idk many things can happen.

@Riley12 It's strange to me there is no obvious successor. Not even an obvious 2nd hand man that can manage the regime until a Kim is ready to take over. Quite strange.