Will Beall , who wrote ' Gangster Squad ,' and Kurt Johnstad , who wrote ' 300: Rise of an Empire ,' are tackling two separate scripts for Warner Bros. The scribes are writing — separately — scripts for Aquaman , one of the installments in Warner Bros.’ multimovie scheme to create a cinematic universe based on the DC Entertainment characters. Aquaman is being developed on dual tracks, where studios and producers hire two separate writers to work on the same project in the hopes of getting the best version. The practice allows for release dates to be set while a project is still in development while giving it a muscular push. Warners needs just that as last week it dated nine untitled DC movies between 2016 and 2020. Warners is not revealing which one of those will be Aquaman , but the first untitled DC movie is due for release on Aug. 5, 2016, with two more due in 2017, on June 23 and Nov. 17, respectively. Aquaman is one of comicdom’s classic characters, having