The WWI setting is of particular importance, as it indicates the fact that Wonder Woman’s arch nemesis Ares (a being who feeds on conflict) is pulling strings behind the scenes to plunge the world into complete and utter chaos.
Wonder Woman is a flashback film that centers on Diana Prince’s introduction to the world during WWI.
Upon learning of the horrors of WWI, Diana chooses to leave her home and embark on an adventure to save the world from destruction.
Based upon everything that we have seen from the trailers, it opens on her training to becoming the most highly skilled Amazon warrior (and best fighter in the DC universe) until Steve Trevor (Chris Pine) crash lands on her home island of Themyscira.