Check out this Joker concept art from <a href="/injusticegame/?refid=13&__tn__=%2Cg"> Injustice</a> . Who wins in a fight between this insane Joker and the criminally genius Lex Luthor? Decide for yourself and vote in this week's Injustice Battle Arena: <a href="http://ema.io/MzAz" target="_blank"> <span> http://ema.io/</span><wbr /><span ></span>MzAz</a>