The 'current' Director is listed as Gareth Edwards (Monsters - 2010) so they have avoided the typical "Blockbuster" director route and seem to be keeping the movie a low key in the "Who's who" list of Hollywood Massive Explosions Used in a Film. The only notable names to the movie so far are the two story writers mentioned before, along with Aaron Taylor-Johnson (Kick-Ass, Savages) and Bryan Cranston (Malcolm in the Middle, Breaking Bad, Rock of Ages). The producers are where you are going to see a list of notable names with Jon Jashni, Mary Parent, Brian Rogers, and Thomas Tull already listed.
EDIT - Darabont is confirmed as screenwriter for the film. With his work on films like Shawshank and The Green Mile as well as his current work on The Walking Dead, I am sure he will head up the team.