Destabilizing the regime. Kim is a known quantity. There are some worse belligerent kooks in that menagerie. They might literally start a war if Kim dies.
I think Kim’s nephew is still in hiding, being protected by the U.S., Israel and others after Lil Kim murdered his father. If I remember correctly, the nephew was educated in Switzerland and is considered to be pro-West. He would be one of the presumptive heirs if Lil Kim goes out Gangnam Style.
https://www.youtube.com/watch?v=P3OSqrSdJAM