Two former Watchmen directors receive their next assignments: United 93 and The Bourne Supremacy helmer Paul Greengrass will venture into Iraq’s Green Zone in Imperial Life in the Emerald City, based on the book by WP bureau chief Rajiv Chandrasekaran. And Requiem for a Dream‘s Darren Aronofsky announces his next project will be Black Swan. “John McLaughlin has begun writing the film that looks at the manipulative relationship between a veteran dancer and a rival.” (You can now probably guess who got me into that premiere of The Fountain a few months back.)