"I've got so many riffs," Iommi tells Q magazine. "I wrote a whole load of stuff for another album and we met up in L.A. but the others... well, Geezer didn't particularly want to do another album. Then again, after you've just had a No. 1 album, where do you go from there?

"For the last LP we did record 16 songs (and only used 12), so we may still put something out from that. We don't know yet." Iommi and Black Sabbath will launch their 2016 farewell tour on January 20 in Omaha, NE before dates in Australia, New Zealand, Europe and a return to North America.