Batgirl has already received some cinematic attention, Lady Blackhawk, Hawkgirl, Vixen, the list goes on.
In any case, looking at how well Wonder Woman performed, DC and Warner Bros are wise to start bringing in more superheroines sooner rather than later, both to offer more variety in DC’s heroic lineup and to work towards that same kind of success.
So far the only prominent superheroine that’s running around in the DCEU is Wonder Woman, but assuming that the core lineup of the cinematic Birds of Prey is anything like it is in the comics, that means we’ll be introduced to Batgirl, Huntress and Black Canary at minimum.