As Ozzy notes, he was happy that band made the album, as it meant that 1978's "Never Say Die!" wasn't his swan song with the band:
"When we did the album '13', if that was going to be the last album I ever did with Black Sabbath, it was okay, because before, in 1978 with 'Never Say Die!', wasn't a good time for me with Black Sabbath. So if we never do another thing together again, we ended on a better note. The only sad thing was that Bill Ward never played on it."
Ozzy also noted that, while he couldn't confirm if the band would be recording a follow-up, he would be interested in doing one:
"Everybody asks me if there's going to be a follow-up to '13'. And all I can say is, 'I never say never anymore.' I don't want to say, 'Yeah, we're never going to do another album,' because if everybody agrees and we don't take 500 years again to make another album, I'm up for it. I wouldn't mind doing another Sabbath album."
Speaking about Tony Iommi, Ozzy noted that the guitarist is still in good health:
"I haven't had one of them dark phone calls so I presume he's okay. He's unbelievable. I mean, any of us could be diagnosed with cancer. I always think cancer means death. I didn't know anybody who'd recovered. My wife recovered from colon cancer and that was the first person I ever knew. But he just accepts it and gets on with it. I mean, it's got to be worrying. But he's doing fine, I think, I hope. He's unbelievable. We all know our job, we all know our craft, but he's a very talented guy. Considering on his fret hand he's got no fingertips, he plays with prosthetic fingers at the end. I've often said to him, 'How the hell do you know when you're touching the strings?' I don't know. It's amazing."