Nicole Kidman, an Australian native herself, hadn’t filmed any of her scenes prior to the press day, and through our various conversations with actors and filmmakers we learned certain details about her role.
Specifically, Atlanna dies before the start of the main story, punished for her relationship with the titular hero’s father (played by Temuera Morrison).
The above quote comes from a roundtable interview with Peter Safran on the set of Aquaman last summer in Melbourne, Australia, but I also learned that Atlanna’s role in Aquaman isn’t exactly gigantic.
There will be key flashbacks, however, and it will be through those that she influences the narrative.