According to reports, Seohyun has been chosen to MC the event which will take place in early April. This does not mean, however, that she won't be performing - she will be both performing and MCing the concert.
As of right now, it is unsure whether she will be MCing just the K-Pop artists' performances on April 1st or the entire event including the North Korea Art Company stages.
Meanwhile, various Korean artists will be visiting the East Pyeongyang Grand Theater and Pyeongyang Arean from March 31st to April 3rd, performing once each. The lineup includes the following: Red Velvet, Jung In, ALi, Seohyun, Baek Ji Young, Lee Sun Hee, Yoon Do Hyun, Cho Yong Pil, and Choi Jin Hee.