A few minutes ago, Geezer Butler posted this to his own website:
I would like to make it clear, because of mounting speculation and rumours, that there will be definitely NO reunion of all four original members of Black Sabbath, whether to record an album or to tour.
Pretty definitive statement on the future, eh?
Can’t have an original reunion without one of them (of course one could make the point it was tried once before when Bill Ward wasn’t invited to be part of a reunion in 1997, but hey).
If you want to discuss this, visit this thread on our forums here.