Frank Miller Completes Script for 300 Sequel Frank Miller has reportedly finished a first draft of a proposed sequel to the bestselling graphic novel 300. The sequel will take place between the Battle of Thermopylae and the Battle of Plataea (seen at the very end of 300). Watchman director Zach Snyder, who helmed the first picture, has expressed an interest in returning should the project be greenlit. It has also been raxzumoured that co-writer Kurt Johnstad will contribute to the screenplay. Independent company Dark Horse Comics has been confirmed as the graphic novel’s publisher, with Miller said to be on the verge of turning in a draft.