Great story and link.
It's interesting that the legend saying a lineage of god once ruled as king in Korea dates so far back in Korean history. Are you implying that the people of North Korea were ripe for a god as king?
I really found the links to sun worship interesting. Kim Il-Sung means "Kim Become the Sun" - according to Wikipedia he took that name a decade before becoming the leader of North Korea. His main claim to deity seems to be that he "discovered" the burial site of Dangun - a site which was eventually marked with another famous symbol of sun worship - the pyramid. His Holiday is called the "Day of the Sun" and he is even worshipped as the creator according to some links.
Very interesting how such things can come together into what appears to be a cult with the god of the cult once again atop the throne of that land - and in control of the most tyrannical society on earth.
I guess the Japanese do the same thing though - very odd, and great food for thought. Thanks for sharing!