Gigantour 2 will be sometime this summer, but the bands haven't been announced yet. Obviously Megadeth will be there, but supposedly Mustaine is negotiating with Overkill and Anthrax, which would be badass, as they're both East Coast bands, and thus don't come out to California much. Other rumored bands are Death Angel (one of my least favorite Bay Area thrash bands, so this gets a 'meh' from me), and the reunited Judas Priest. Obviously, the latter would be great, but it's totally unsubstantiated at this point, whereas Mustaine's invitation to Anthrax and Overkill's negotiations are true.