Actually - this is what season pass gets you:
•Two campaign Game Add-ons that each deliver new locations to explore, stories to experience, and bosses to battle. Each of these Add-ons also includes new weapons, new Amps, a new Trap, new character outfits as well as new challenges and Chaos Squad* objectives!
•The Weapons Pack Game Add-on, which includes four deadly new weapons to augment your arsenal!
•BONUS - six character outfits, two Amps and two Traps to use as soon as the game is released