This comes after the news that Ozzy and Sabbath guitarist Tony Iommi have buried the hatchet after resolving their dispute about the naming rights for the band, leading me to believe that Tony would also be on board.
Ozzy mentioned Bill Ward (drummer) in his interview, so it seems that Geezer Butler is the last piece of the puzzle. If this reunion happens and a stop is made anywhere in the Midwest, I'm gonna get there to see it and pay tribute to the true founders of heavy metal.
Sidenote: It has been alleged by fans of the Adult Swim show Metalocalypse that William Murderface's character was inspired by Geezer Butler, though the show's creators refuse to acknowledge this. I gotta say I can see the resemblance...how about you?
Or maybe he looks more like the dude that Happy Gilmore shoots with a nail gun: