Brendal Fletcher and Bengal pitched an all-female Justice League around the time they worked together on the New 52 Batgirl book.
The roster would've been Lois Lane, Batgirl, Supergirl, Big Barda, Vixen, Hawkwoman, and Miss Martian.
This feels like a mid level team. Not as street level like the Birds of Prey (Oracle, Dinah, Helena, Zinda) or as hard hitting and powerful as an all female JL (WW, Zee, Vixen, BC, Hawkgirl).