Anyone who has read Orson Scott Card’s beloved 1985 sci-fi novel, Ender’s Game, can understand why, for the past 20 years, Hollywood has been unable to adapt the book. After all, it’s challenging enough to shoot a movie about pint-sized military recruits fighting each other in a futuristic, space-set Battle School, but it’s an even taller order to capture the novel’s complex themes about war and morality...