It’s time to clean up Metropolis. But two of Superman’s deadliest enemies, Lex Luthor and Kobra, have designs on and plans of their own for the several tons of kryptonite that are being removed from its streets! With Ra’s al Ghul added into the mix, can Superman and his allies stop the plans to turn Metropolis into a Kryptonite City? Guest starring the Green Lantern Corps and Firestorm the Nuclear Man!