North Korea hasn't declared anything yet and all this information is coming from South Korea intelligence. Some still think this is just a rumor started by South Korea and his first son may still be a possible successor.
Quote:
“I am skeptical about these reports,” said Lee Seung-yong, an official at Good Friends, a Buddhist-affiliated relief agency that collects news about North Korea from informants inside the country. “I even think that rumors spreading among party officials in North Korea about who’s succeeding Kim Jong-il actually originate in South Korean media, which then report these rumors.”
|
http://www.nytimes.com/2009/06/03/wo..._r=1&ref=world
Other source:
http://online.wsj.com/article/SB124394212700076381.html