Halo

Based on the iconic video game, a Halo movie would presumably center on an interstellar war between humanity and a theocratic alliance of alien races, named the Covenant. The protagonist of the video game is Master Chief Petty Officer John-117, a cybernatically-enhanced super-soldier.

A movie version of the first-person shooter has been in the works for years. Novelist and screenwriter Alex Garland (Dredd) provided a Halo screenplay, the later D.B. Weiss (Game of Thrones) and Josh Olson (A History of Violence) did rewrites of the Garland screenplay.

Right now, the movie rights for a Halo have reverted back to Microsoft, after several studios failed to get a movie made. It remains to be seen if a new a live-action web series based on the game and the fourth part of the video game franchise, which is due in November 2012, can breath new life into the long-gestating movie project.