I saw Dread Zeppelin a few years back with Mojo Nixon on the support bill.
Amazing mix of styles, Zep songs, reggae style with an Elvis Vocalist.
I heard a tape of a phone call Robert Plant made to Tortelvis( the singer) during a radio interview and Plant was quite flattering to the band.
It's a bit like the Spinal Tap joke, you know, every one knows they are not a real band but we play as if they are.