Black Sabbath
In 1984, Butler left the band for a solo project. Iommi put sabbath on hiatus while into the studio to record a solo album. It was meant to be an all star album with multiple singers. He ended up using Glenn Hughes on the whole album. He hired many bassists to replace original bassist Butler. He hired many drummers to replace original drummer Ward. Seventh Star was not meant to be released as Black Sabbath. It was going to be his debut solo album. However, Iommi ended up being his debut it was released in 2000. Tony Iommi wanted it to be his debut solo album, but his Warner Bros/Vertigo refused to do so, stating that the Black Sabbath name would make more money. Iommi wouldn't do that, and Sabbath was not selling good at the time so it made more sense to mark it as a solo record. They came up with a solution. It ended up being released under Black Sabbath featuring Tony Iommi.