The South Korean expert anticipated that the inter-Korean summit's major goal is to have Kim Jong-un personally confirm his country's readiness for denuclearization.
The two Koreas are discussing the wording of a joint statement that could be released at the summit, Im said.
After meeting North Korean leader Kim Jong Un in Pyongyang in March, South Korea's national security adviser and spy chief said Kim was committed to denuclearizing the Korean peninsula and had expressed a willingness to meet US.
North Korean leader Kim Jong Un likely made a decision to put his nuclear weapons program up for negotiation to win outside rewards so he can improve his country's economy, win public trust at home and prolong his leadership, a special adviser to the South Korean president said Tuesday.
Some of the issues that would have to be tackled include the hundreds of thousands of troops along one the most heavily fortified borders in the world; submarines and ships patrolling on both coasts; South Korea's active military alliance with the U.S; the hosting of US forces; and North Korean artillery pointed at Seoul.
The comments by culture minister Do Jong-whan came as the country's conservative newspaper Munwha Ilbo said the two Koreas were discussing plans to announce an official end to the military conflict on the peninsula.
"The inter-Korean summit can be seen as a touchstone, an overture ahead of a more important North Korea-US summit", he said, adding that if both summits were a success "many possibilities", such as normalization of political relations, economic cooperation, etc., would open up for all the participants, especially Pyongyang.
"A North Korea-U.S. summit is scheduled to be held after the South-North Korea summit". North Korea's outreach to its traditional allies was perceived as an effort to build its negotiating power with the United States for when Kim meets Trump in May or early June.
The two Koreas agreed last month to install a hotline for their leaders to help defuse military tension and facilitate consultation.
The two leaders will meet at Peace House, a South Korean building inside Panmunjom, making Kim the first North Korean leader to set foot in the South since the 1950-53 Korean War. "The United States will insist on complete, irreversible and verifiable North Korea's abandonment of its nuclear program in rigid timeframe".
No peace treaty has ever been signed to replace the 1953 armistice that ended the Korean war, and the USA and North Korea have been at loggerheads since formal hostilities ended.