The only reason there is anything vaguely resembling Birds of Prey is because Margot Robbie wanted to make the movie. If it were just up to Warner Bros. there never would have been a Birds of Prey movie anyway.
Birds of Prey was never even on Warner Bros's radar.
That is not Birds of Prey either. Where is Batgirl? All this does is substitute Catwoman for Harley Quinn.
Supergirl too. Supergirl is also a big character. She is getting another movie, has her own comic book, and has her own TV show. Plus Supergirl is a major character in the DC Super Hero Girls cartoons. At this point in time
Supergirl might be a bigger character than Catwoman outside the comic books.
The studio could make any character work if they wanted too. The question is do they want to. What is their incentive? Who is pitching the movie? Until Margot Robbie came along was there anyone wanting to make a Birds of Prey movie?
If so I never heard anything about it.
If you don't consider this movie a Birds of Prey movie you are no better or worse off than before. You weren't going to get a Birds of Prey movie anyway and so you still don't get a Birds of Prey movie.