Featuring current Sabbath members Tony Iommi and Geezer Butler, along with former mates Ronnie James Dio and Vinny Appice, Heaven and Hell are reuniting for one hellacious 2007 tour. Joining H&H on the road will be metal gods Megadeth and southern heavy metal group Down, fronted by former Pantera singer Phil Anselmo. Yeah, it's gonna be loud — better bring your earplugs.