Discuss in your essay how the filmmakers adapt and/or transform one or more aspects of classical myth. There is no need to be exhaustive in your treatment of myth in the film; doing so will make your essay superficial. For example, you could discuss the use of a particular theme or motif in the film, the characterization of a particular character, or one particular episode or part of an episode.
Think about what version of the myth is being adapted and what ancient texts we have read (or will read) that treat that myth. Does the filmmaker seem to have an agenda? If so, does it differ from that of the ancient authors who treated that myth? What are the contexts of this film adaptation (historical, literary, cultural, religious, etc.)? Does the filmmaker seem to have an audience(s) in mind?