Injustice: Gods Among Us Gameplay: Batman vs Lex Luthor: Here's footage from the demo of Injustice, featuring the Dark Knight taking on Bruce Willis-in-a-robot-suit Lex Luthor. Have you tried the demo yet? Can it stand up in a world of struggling fighters? Let us know. Injustice: Gods Among Us is out on PlayStation 3, Wii U and Xbox 360 on April 19th, and the demo is live now.