Metal father Tony Iommi addressed the idea of a "13" follow-up, expressing uncertainty about making another Sabbath effort. Chatting with Revolver magazine, the axeman pondered on pros and cons of hitting the studio again without giving a definitive answer. "I don't know if that would be an anticlimax if we wrote another album," he said . "I'd like to, but we haven't actually spoken about it, you know? "I don't know if that would be a good idea after this one, because this one's done so well," Iommi continued (via Blabbermouth). "I'm sure we'd all like to do one. But I don't know. Maybe I should talk to the others about it."
Geezer Butler and Ozzy Osbourne chipped in, admitting they haven't exactly given the idea much thought. "I'm just glad that we made this one," Butler explained. "It can't be something where you go in and go, 'Well, that one was No. 1, so let's do another No. 1 album.' I think we'll know if we can do it or if we can't. If we have to force it, then we won't be doing it." After recently stressing that he'll most certainly record another Sabbath record, Osbourne now shared more of an indecisive stance. "I don't want to say there's going to be another album, because I don't want you to ask me in another year, 'What happened when you said you were going to do another record?'" he said. "I'll leave it open. I'm open for anything. I have three albums to deliver of my own solo thing to my record label." During the rest of the chat, Geezer also discussed some of the lyrics he wrote for "13," specifically for an unreleased track "Hanging By a Thread." As the bassist pointed out, the lyrics were inspired by Tony's cancer battle and even the possibility of his passing. "It was very much about dying, about giving your last breath and passing your spirit on," Butler explained. "We didn't know if [Tony] was going to recover from it, especially after seeing Ronnie go so fast. Ronnie went right in six months from being diagnosed to dying." "13" saw its release on June 10 through Vertigo as the band's nineteenth studio effort.