Zach Galifianakis has been forced to drop out of starring in R.I.P.D. alongside Ryan Reynolds. The actor apparently wanted to do the project, but scheduling issues with Jay Roach’s Southern Rivals, in which he co-stars with Will Ferrell, combined with his commitment to Bored to Death made doing both pictures impossible. To be directed by Robert Schwentke (Red) R.I.P.D. is based on the Dark Horse comic in which dead police officers patrol the underworld. Deadline reports that there was also concern over whether Warner Bros. will be using their option on Reynolds to get him to film Green Lantern 2 this summer, the same time that Universal was hoping to get R.I.P.D. in front of cameras.Southern Rivals is now the confirmed title for the political comedy that Roach, Ferrell and Galifianakis shopped around to studios back in December. Not much is known about the project other than the fact that it focuses on two political candidates. R.I.P.D. has been in the works for quite some time and this is definitely a setback, especially given the fact that Reynolds’ passion project Deadpool now has a director.