Christopher LaRoche, co-president of the North Korea Research Group, was interviewed by CTV's Canada AM on 3 June 2009 regarding recent news of succession in North Korea.
Highly speculative and difficult to verify, it is nonetheless a subject matter of great importance. For a quick academic read on the subject matter, a good synopsis can be found on the Institute for Far Eastern Studies (IFES) Forum, by Prof. Kap-sik Kim (External Link).