Robert Kirkman has conquered comics and he has taken television by storm with The Walking Dead. Now he is setting his sights on movies. Kirkman is producing Air, a sci-fi thriller to which Norman Reedus, one of the breakout actors on Walking Dead, and Djimon Hounsou have signed on to topline, The Hollywood Reporter has learned exclusively. Sony Pictures Worldwide Acquisitions is in final negotiations to acquire the project. Christian Cantamessa, the video game hot shot who co-wrote and was the lead designer for games such as Red Dead Redemption and Grand Theft Auto: San Andreas.