How? There's no Wonder Woman. Maybe they can do a Birds of Prey. But a female Justice League? Nope.
But let's see.
- Felicity
- Dinah (Black Canary)
- Laurel (Black Siren)
- Iris
- Kaitlin (Killer Frost)
- Nora (XS) (maybe, but she looks like a temp)
- Sara (White Canary)
- Vixen (depends who is playing the character)
- Kara (Supergirl)
- Alex
- M'gann M'orzz (Martian Girl) (maybe)
- Kate (Batwoman)
Almost half of that list are regular humans. I don't think they have enough for a Justice League. And without Wonder Woman there really can't be a Justice League. Unless Nora is a permanent member, there's no female Flash either.
EDIT: I forgot they offscreened Hawkman and Hawkgirl too (LoT).