For years, The Riddler didn't really pose much of a threat to Batman, but everything changed when he became one of the Caped Crusader's only foes to figure out his secret identity. Using that information to try and destroy the hero's life (during the famous "Hush" storyline), Edward Nygma found himself propelled to the big leagues, something which has carried over into the rebooted New 52 Universe. There, he was revealed to be one of the first bad guys Batman ever faced, taking over Gotham City and plunging it into chaos until the Dark Knight finally managed to outwit him. Despite his silly appearance, he's definitely not to be trifled with.
