While it is clearly obvious that Roy Orbison couldn't have been replaced in The Traveling Wilburys, who do you think could have filled in for him and given good musical and songwriting input? My personal pick would be either Johnny Cash or Carl Perkins. Johnny Cash had worked with Dylan & Orbison, and was in a career slump, and it would have shot him into absolute god-like legend status before the American Recordings ever came out. Who knows what kind of success Vol. 3 would've done? Or if there were even a Wilburys tour?... Who would be you pick/picks for Orbison's spot?