The group will issue a full video on Wednesday and, in advance, they've offered up a 30-second preview clip of what fans can expect.

"The last time we were in the studio, all together, was 1978," says guitarist Tony Iommi, referring to the band's "Never Say Die" album.

"If you try to live up to the expectations of the past album, then you just fail dismally," explains bassist Geezer Butler.