If you could make a list of bands that would never tour with System of a Down in a million years, Unwritten Law would be near the top. I would take this with a grain of salt right now.
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)