We may know the (tentative) plans for the DC Comics film slate that stretches from now until 2020, but one adaptation in particular is still a mystery: Guillermo del Toro's Justice League Dark. The movie - which focuses on the more supernatural side of the world inhabited by the likes of Superman, Batman and the "proper" Justice League - doesn't yet have an official greenlight from Warner Brothers, but del Toro is hard at work on writing the script.