Months after Osbourne's wife and manager Sharon Osbourne said the band would play their "farewell show" at Ozzfest Japan in November, that appearance was then cancelled and Ozzy suggested a final tour and album would be coming in 2016.

However, Butler is not entirely convinced. Saying he has "no idea" if it will happen, he tells the NME: "I'd love to keep going, I'd desperately want to keep going before I kick the bucket."