A dispute over money caused drummer Bill Ward to opt out of rejoing Ozzy Osbourne, Tommy Iommi and Geezer Butler for the Black Sabbath reunion album.  The vacancy created by Ward's hold-out was filled during recording sessions by Brad Wilk of Rage Against The Machine.  Whether Wilk participates in a tour scheduled to begin in Australia in April remains to be seen.  The album, titled 13, will get its US release in June.
LambGoat.com