In the last few weeks, Russell, the studio and producers (Charles Roven of "The Dark Knight" fame is one) had been negotiating for Russell to come aboard. But the parties haven't been able to come to terms so they're going their separate ways, sources say. Producers and the studio are going back to the drawing board. They'll look for a new director -- and first they may even look for a star or two to join the project. (With the male and female co-leads, it's essentially a two-hander, so expect the casting process to be involved.)