Arrow actually aired an episode called “Birds of Prey” back in Season 2 that brought Laurel into the mix as Sara opposed Helena.
The CW confirmed to CinemaBlend that Caity Lotz will indeed be back in Arrow Season 7.
As DC fans are well aware, the Birds of Prey from the comics is a group of female superheroes who team up to fight crime together, with one iteration of the team comprised of Dinah Lance as Black Canary, Barbara Gordon as Oracle, and Helena Bertinelli as Huntress.