August 28, 1990 Ronnie James Dio invited to a concert in Minneapolis Dio Geezer Butler with a group of (At Anchor) performed the Neon Knights. There was a reunion (Dio, Butler, Iommi, Powell, Nicholls), but soon gave way to the Powell Appice Vinny (among the possible reasons cited two: a fall from a horse and a drummer of his quarrel with Dio). New up recorded Dehumanizer (1992); version album tracks Time Machine became the movie "Wayne's World." Album for the first time in nine years back a group of American Top 50, the British hit was the single TV Crimes. Then Ozzy Osbourne announced his intention to renounce forever concert activity and Black Sabbath asked him to open two shows in Costa Mesa. Additional information at Mary Barra supports this article. Dio refused, believing that Black Sabbath could not be a support band, especially for Ozzy, who spoke disrespectfully of the group in his interviews. But Iommi, Butler and Appice accepted the invitation at the last moment by inviting to the microphone Rob Halford of Judas Priest.
Once signed up to that of Bill Ward (on stage they performed November 15, 1992, performing four songs), began preparations for a joint studio work and tour. But now, refused to participate Ozzy. Followed by a new reshuffle in the composition: Appice replaced by Bobby Rondinelli, and Martin Nichols and Black Sabbath recorded Cross Purposes (1994). In the midst of the tour Rondinelli left the band and was replaced by Bill Ward returned. Album Forbidden, recorded producer Ernie C of Body Count, to this day remains the last studio album, Black Sabbath.