Why not make Neuro's next karaoke a "greatest hits" karaoke? Mix in a few new highly demanded songs (1/3, 1/4 ratio?) and then have the climax be Vedal and Neuro's duet.
For this specific format I think it might actually be better for hype-building and retention -not- to have a set list, since everyone knows every song will be a banger anyway; this way they have to pay attention or they'll miss their favourites. (Not to mention some new songs).
(Songs could be hand-picked by Vedal, based on YouTube plays, voted for by the community, or determined by some combination of these methods).
Apologies if this has more or less been done already, I do know we get a lot of redos with v2/v3 songs as it is, but I think there's still a lot of potential with how many songs there are to choose from and I think combining the excitement of Vedal's vocal debut with a greatest hits theme would really generate hype.
