5. Lobo
Lobo was created in 1983 by Roger Slifer and Keith Giffen, and though he was rarely used at first, he did get his own comic and has gathered a bit of a cult following. Lobo is an interstellar bounty hunter and mercenary from the planet Czarnia. He's one of DC's darkest and most hardboiled characters, and his name roughly translates to "he who devours your entrails and thoroughly enjoys it." He likes nothing more than violence and intoxication and loves to kill. He committed genocide on his entire race by unleashing a violent plague on his homeworld, and at one point told Superman: "I'm the last Czarnian. I fragged the rest of the planet for my high school science project. Gave myself an A." Lobo was originally used as a villain, then became an anti hero in the 1990s when he was given his own solo comic. The character has, non-surprisingly, had a tough time making it to the big screen, though a feature film has been in development since 2009. Guy Ritchie was originally attached to direct, but dropped out in favor of making Sherlock Holmes: A Game of Shadows instead. The Lobo project then lay dormant for a few years before Brad Peyton (Cats & Dogs: The Revenge of Kitty Galore and Journey 2: The Mysterious Island) signed on to direct with Dwayne Johnson to star. Luckily, that project came to a screeching halt earlier this year and now Lobo has fallen back into limbo. Needless to say, a director like Peyton would have most likely made a terrible adaptation, though Johnson could be great in the part. Rumors quickly broke that Lobo could make his debut in the (potentially) upcoming Justice League film, though there's been no word on the possibilities of that now that Zack Snyder and David S. Goyer are busy laying the groundwork for a new DC cinematic universe. Frankly, Lobo provides a significant risk for the studio, and chances are he won't be debuting anytime soon considering how hesitant WB/DC is at adapting their more popular (and in-demand) properties.