The idea would be for a group that would center around a "k-pop" esque system but it would be more centered on a band concept- all members carry and play instruments and play them during shows, kinda like a band
A pop-rock sound would fit perfectly with this concept; I believe the selection would be based more on vocals, visuals, and instrumental prowess, since dancing would probably be out of the question.
of course, I don't know if this would be a hit in Korea, but it would certainly be a unique concept.