After Kim Jong Il's death, North Korea's secretive regime described his youngest son, Kim Jong Un as "the great successor."
But Jong Kim Sun-a professor of Asian Studies at the University of South Korea-says the isolated Communist state "has entered into a period of major uncertainty."
He adds: "There is a real possibility that a former South Korean-Sun Myung Moon-may try to fill this power vacuum.
Professor Sun emphasized he is not related to Moon-even though both have the word "Sun" in their names.
Moon heads the Unification Church and believes he is the second coming of Jesus.
Asked about his chances of leading North Korea, Moon said he would welcome the chance to rule any country, especially a dictatorship.
"My coronation in the Senate Office Building in 2004 shows I am a true ambassador of peace. I'll bet I could easily bring North and South Korea together under my religion."
At the 2004 ceremony, with many U.S. lawmakers in attendance, Moon crowned himself with what he called "The Crown of Peace." Moon has spent time in U.S. jails for tax fraud. He was granted U.S.citizenship by President Richard Nixon.
"I still love Nixon," Moon declared, "and I will reign over a unified Korea in a criminal manner similar to the way Nixon ruled America"