Warner Bros. have bought a new project from a writer who's worked on Sherlock Holmes, Quantum of Solace and the new Dune movie... so why are they keeping it such a secret?

While the Hollywood Reporter's Heat Vision blog notes the sale of the project from writer Josh Zetumer, it's less forthcoming about what the project actually is: Described as being "star-driven" and having "a genre component to it, although it is not sci-fi," the blog compares the project to Christopher Nolan's Inception. The unnamed project will be executive-produced by Ruben Fleischer, with no director or stars named at this time.