Del Toro developed the story with Matthew Robbins and Gris Grimly, who was previously co-directing; Robbins handled the script. With Del Toro now attached as director, Inferno Entertainment will likely do some successful shopping at Cannes. More details at Variety.
Del Toro helped to write the upcoming pair of Peter Jackson's "Hobbit" tales (he passed the directing reins to Peter Jackson), and among the projects has been linked to as director are: Universal's "Dr. Jekyl and Mr. Hyde," Warner Bros.'s "Beauty and the Beast" (with Emma Watson attached), Warner Bros.'s Roald Dahl adaptation "The Witches," "Saturn at the End of Days" (with co-producers Alfonso Cuarón and Alejandro González Iñárritu). Sadly, Del Toro says his 13-years-in-development "At the Mountains of Madness" project (which had Tom Cruise attached) is probably killed because of its similarities with "Prometheus." Here's what he had to say last year about "Rim" and "Mountains," and some great soundbites from his participation in last year's Comic-Con panel for "Don't Be Afraid of the Dark" (which he wrote and produced).