Forget actors. Directors are Hollywood's new movie stars.

Christopher Nolan. Aalok Soni/Getty Images for Universal Pictures "The Odyssey" is on track to gross at least $1 billion worldwide. It stars plenty of famous actors, but the real draw is its director, Christopher Nolan. A new generation of movie fans cares more about who's behind the camera, rather than in front of it. If you've spent any time online lately — or, frankly, if you've been a person living in the world — you've probably heard some version of: "There's a new Christopher Nolan…