Why would dave have to sing hagar tunes?
Most all bands go out on tour to promote a new album.
It would be a NEW BAND after 20 years not van halen pre dave or post.
It would be completely new ,new problems ,new music , new times.
If they sung any of the old songs they would be exclusivly, ROTH.
They write and arrange so good together there would be no gaps to
fill w/ hagar music.DIG!