In January 2020, David Ayer Confirmed Gotham City Sirens Was On Hold
By early 2020, for every person who was excited for Birds of Prey, there were other fans who were concerned about the status of the other female-centric DC movie they had not heard much about in the previous few years. David Ayer was on a Television Critics Association panel promoting the Fox drama Deputy in January when SlashFilm asked him about Gotham City Sirens, to which he said that it was now on indefinite hold.
More than a year later, the spin-off remains in that same position. At the same time, we still have yet to see the sequel to David Ayer’s Netflix original fantasy drama Bright, which the filmmaker promised would happen soon at the same panel, but that’s another story.
Source: Cinema Blend