The 2014 Rockstar Energy Mayhem Festival schedule has finally been announced!  While the actual line up has yet to be released, there are strong rumors that the following bands will play: Avenged Sevenfold, Rob Zombie, Slayer and Five Finger Death Punch.   The official line up will be announced on March 31, 2014. The hard rock festival will kick off July 5 in San Bernandino, CA and will wrap up