Christopher Nolan is an ambitious director, he's about to take his biggest challenge yet. His about to make a WW II epic on the evacuation of Dunkirk. When Blitzkrieg overran France, French (including Charles De Gaulle) and British Expeditionary forces were trapped on the beaches of Dunkirk. Had the Germans captured them it would have extended the war into the late 40's. Nolan is a very organized director but he'll face the same logistical problems that Alejandro Inarritu faced making The Revenant. He usually has a rough script and some of his casting done before making an announcement. Mark Raylance (Bridge of Spies), Kenneth Branagh and Tom Hardy are in talks to front the film. Correct me if I'm wrong but a film about Dunkirk has never been made, I wish him luck.