There's the Joker, the Penguin, the Riddler the Tw...  ...er, the Penguin, the Riddler the Two Face and the Mr. Freeze , and then there's the "greatest villain" who is p...

(YouTube Link) Somehow I doubt that Arnold Schwarzenegger's singing voice sounds as good as the guy singing in this comedic spoof, but then again I can barely understand Arnold when he's actually trying to enunciate eve...