Metallica, Megadeth, Slayer and Anthrax will share the stage at Sonisphere this summer. Initial dates for the big four to share the stage are in Warsaw, Poland and Prague, Czech Republic on June 16 and 19, 2010 with Metallica.com revealing: Youve been posting and chatting about it for months and were here now to confirm it . . . METALLICA, SLAYER, MEGADETH, and ANTHRAX will all share the same stage for the first time EVER! Look for the four of us at the Sonisphere shows in Warsaw, Poland and Prague, Czech Republic on June 16 and 19, 2010 with a few more of the festival dates still in the works, you can be sure these shows wont be the only ones..