"Casino Royale" and "The Mask of Zorro" helmer Martin Campbell is in early talks to direct the espionage thriller "Hunter Killer" at Relativity and Original Films. Based on George Wallace and Don Keith's novel "Firing Point," the story follows a renegade Russian military leader who pushes the U.S. to the brink of a nuclear confrontation. Cut off from all outside communication, a submarine commander and an elite Navy special forces unit are all that stand between the Russian assault and all-out war. Campbell is just the latest name attached to the helm of the project, and this would mark his first film since "Green Lantern". Previously the likes of Antoine Fuqua, Phillip Noyce, McG and Steven Quale have all been linked.