Saturday Night in Gotham (2018)

Following a lead on her latest bust, Batgirl drops in on Trace Atley, an ARGUS defector who's been selling weapons to the criminal underground. But a much bigger threat begins to unravel, and Batgirl will need some help from Tim Drake aka The Robin. As They face off against a score of Mercenaries and two of Gotham's deadliest villains, both Vigilantes fight their way to the truth about the mysterious looming threat coming to their city.