When the A.V. Club recently spoke with comics scribe Brian K. Vaughan, he kept the status of various film adaptations of his projects pretty close to the vest. But maybe he wasn't just being cagey. The Warner Bros./New Line adaptation of his sci-fi epic Y: The Last Man, focusing on the life of the planet's last living male, has been troubled since the outset, and now, director D.J. Caruso, who has been attached to direct for some time, has walked away from the production.