Black Sabbath surprised us all when they reunited (sans original drummer Bill Ward) last year for 13, which debuted at Number One on the Billboard album charts. Now, Ozzy Osbourne, Tony Iommi, and Geezer Butler are coming back for another go-round; the band are working on another album that is due out some time in 2015.

In an interview with Metal Hammer, Osbourne revealed that he, Iommi, and Butler had already started writing songs for a new album. The band are aiming for a release date at the beginning of next year, though Osbourne admits that that would all depend on Iommi’s cancer treatment. The guitarist has been undergoing treatment for lymphoma for a year.

Osbourne also hinted that the band’s tour behind their next album might be their last. Overall, though, the singer appears to have no regrets about going back to Sabbath. “The whole Sabbath experience this time around was great,” Osbourne said. “It was a lot of fun. So we’re going to do one more album and then a final tour.”

In the meantime, Osbourne has compiled some of the finest work of his solo career into a CD/DVD collection titled Memoirs Of A Madman, which hits stores on October 14th. Check out the trailer for the Memoirs Of A Madman set below: