The reunion of Black Sabbath will reportedly beging at next year's Download Festival as Donington Park in England.  The festival is set for June 8th through the 10th, with all four original members taking the stage together to headline the last night of the festival.  Metallica, meanwhile, is set to headline Saturday night's performances, performing their 1991 self-titled album in its entirety.  Watch a promo clip for Download 2012 below.

Tickets for Download 2012 are scheduled to go on sale this Friday, with weekend passes being sold at the same price as those for Download 2011 until January 30th, after which the price will be raised.