i am not discounting the power of those bands. i am only suggesting what i think will fit into GV's mold.
GWAR - NO FING WAY, even tho i would like a take-home aborted baby mold.
Slayer - nah, but maybe Sepultura?
Converge - don't know them so I cant comment
Tool - would love to see them, but i believe Puscifer is a better fit.
I could see Maiden simply because they are metal gods, but they would have to headline and that wont happen.