The Fall of Gotham (Young Justice/Red Hood Crossover )

When Wally West died in Gotham City ,Artemis was destroyed. She,The Red Hood and the team are taking matters into their own hands now,starting with Gotham--it's up to Batman,Batgirl and Nightwing to stop them--but at what cost?
-Dick Grayson is a detective that moonlights as Nightwing,Barbara Gordon as Batgirl
-Kaldur'ahm is a nightclub owner and smuggler with too many secrets--Roy Harper (Arsenal) is the only only one he trusts completely
M'Gann Morzz and Kon El are aliens living in plain sight,struggling to adjust to life in Gotham--
-Zatanna Zatara is a nightclub singer with mystic powers and spies all over Gotham--one a shifty mage named John Constantine
-- Cassie Sandsmark is a underground street fighter with super strength running from her past--Jaime Reyes is a traumatizedpatient at Arkham with a killer alien inside him-Tim Drake is a surviving victim of the Joker out for revenge
--Artemis Crock is the thief Tigress and rival of Catwoman...her lover and partner Wally West died a hero leaving her in a state of despair--Bart Allen is the nephew of ex-police officer Barry Allen, killed by The Joker five years ago now returned to life---And Jason Todd is another of Gotham's victims who survived ,now returning as the murderous vigilante Red Hood

Years ago they all worked together protecting the innocent,dabbled in crime to survive and made name for themselves--but after too many loses,they decide to tun to darkness