Initially , Dio and Iommi discussed forming a new band , rather than a continuation of Black Sabbath .
Ronnie James Dio was first introduced to Iommi in 1979 by Sharon Arden , who would later marry the band 's then - recently fired vocalist Osbourne .
Initially , Ronnie James Dio and Iommi discussed forming a new band , rather than a continuation of Black Sabbath .
Ronnie James Dio was first introduced to Iommi in 1979 by Sharon Arden , who would later marry the band 's then - recently fired vocalist Osbourne .