Justice League is a 2017 American superhero film directed by J.J. Abrams and based on the DC Comics superhero team of the same name. The film is the ninth part of the DC Movie Universe and the final part of it's "Year One" phase. It is a crossover between the previous films in the series, and features superhero characters established in each one. In the film, Batman is sought out by the Martian J'onn J'onzz, who requests his help in recruiting a team of superheroes to help combat the armies of Atlantis, which are preparing to take over the surface world. Armie Hammer, Eric Bana, Michelle Monaghan, Bradley Cooper, Nathan Fillion, Doug Jones and Alexander Skarsgard make up the main cast. The score to Justice League was composed by Hans Zimmer.