The lineup should be:
Mainstage:
Ozzy solo and/or Black Sabbath
Megadeth
Killswitch Engage
Hellyeah
Black Label Society

Second stage:
Rob Zombie
Slipknot
Devildriver
Machine Head
Down (even though hellyeah and down prob wouldn't work out on tour, it would be awesome 2 see!)
and other bands