The 1972 Black Sabbath song that almost featured Led Zeppelin drummer John Bonham: “I’d love to hear it”When hard rock was starting to come into its own, Black Sabbath and Led Zeppelin seemed to arrive from different worlds. Once Sabbath got their bearings on the album Vol 4, John Bonham started paying close attention. Being a big fan of Sabbath, Bonzo was struck by how well the song ‘Supernaut’ grooved and offered to play on the track. As original drummer Bill Ward recalled in Classic Rock, “Bonham really loved ‘Supernaut’. That missing tape has naturally become the sort of thing hard rock fans can obsess over for years.