Although 48-year-old Kidman's potential role has yet to be revealed, it is speculated that she may portray the Queen of the Amazons, Hyppolyta, who in the comic books happens to be Diana Prince's biological mother, according to The Wrap.
Meanwhile, Chris Pine will appear as Wonder Woman's love interest Steve Trevor.
Recent rumours suggested that the film would take place mostly in the modern era with flashbacks to World War I.
It's also said that Wonder Woman would team up with Trevor to destroy Circe who, along with Ares, became the masterminds of World War III.
Wonder Woman will be introduced in next year's "Batman v Superman: Dawn of Justice" before her solo movie hits US theatres on June 23, 2017.
Kidman will next be seen in "The Secret In Their Eyes" starring Chiwetel Ejiofor and Julia Roberts. She has also wrapped Garth Davis' drama "Lion", which also stars Rooney Mara and Dev Patel.