Fan Casting Queen Mera in The Flashpoint DCEU (2018)

Was the queen of Emperor Orin, Mera ruled Atlantis with her husband Orin and was there when the alliance between the Atlanteans and the Amazons was established. She found out later on of her husband's affair with Wonder Woman, which angered her greatly. Having gone to Themyscira, Mera attempted to assassinate Diana, but met her end when the Amazon queen beheaded her. Diana most likely kept her head as a trophy.