According to HeroicHollywood, Warner Bros. has put out word to talent agencies that they are seeking background information on Mera, the Queen of Atlantis, for the first "Justice League" film. Though the report claims Mera will debut in the film, it's unclear if she will join the core Justice League team.
In the comics, Mera is Aquaman's wife and thereby the Queen of Atlantis. Like her husband, she has abilities that have grown out of living in an underwater environment, like super strength, as well as the power to control water in mass quantities. In pre-New 52 continuity, she and Aquaman also have a son. No details about the film's intended version of the character were included in the original report.
Jason Momoa will star as Aquaman in the hero's solo film, expected in 2018. It's likely that both "Justice League" films -- scheduled for 2017 and 2019 -- will also star Momoa. If Mera were to debut in "Justice League," chances are she will reappear in "Aquaman" as well.
Directed by Zack Snyder and starring Ben Affleck, Henry Cavill and Gal Gadot, "Batman v Superman: Dawn of Justice" -- the next DC Cinematic Universe installment -- is scheduled to open on March 25, 2016.