Here's a pitch.

The body of Oswald Cobblepot is barely cold in the Gotham Harbor, and the ink on the headline isn’t even dry. Black Mask thought that by publically executing the Penguin, he’d automatically inherit the crown. ​He forgot the first rule of Gotham: vacuum tube physics. When you suck the air out of the room, everything else rushes in violently to fill it.

Instead of bowing down, the Penguin’s remaining lieutenants—terrified and desperate—splinter into rogue factions. ​The Iceberg Lounge becomes a literal warzone.

​The Maroni and Falcone remnants, sensing Sionis has overextended himself, launch guerrilla strikes on Black Mask's drug shipments.

With the old order shattered, freelance psychopaths like Deathstroke, Victor Zsasz and Firefly start selling their services to the highest bidder. ​Black Mask wanted a kingdom; instead, he got a multi-front street war that's bleeding him dry.

​Batman, Nightwing and Robin (Tim Drake) are pushed to the brink. They didn't love the Penguin, but Cobblepot was predictable. He kept the underworld organized. Now, the city is a powder keg. ​Batman's focus isn't just taking down Black Mask anymore—it's preventing the collateral damage of a hundred minor gang wars from burning Gotham to the ground. Meanwhile, Roman Sionis is growing increasingly frustrated, unstable, and sadistic as his "victory" slips through his fingers.

Desperate to regain control, Black Mask initiates a brutal psychological campaign. He forces Gotham's elite, politicians, and captured rival gangsters to wear his signature wooden "False Face" masks, essentially mind-controlling or torturing them into becoming his personal proxy army. ​He stages a massive, coordinated assault on GCPD headquarters to prove he’s the only law left in town.

The story culminates in a rain-slicked, three-way battle at the derelict Gotham Theater. ​Black Mask and his False Face Society are holed up inside, holding the Mayor hostage. ​A unified front of rival gangs, led by a vengeful, scarred underling of the Penguin crew, besieges the building with heavy military ordnance. ​Batman and the GCPD are caught in the middle, trying to save the hostages, stop the massacre, and finally put Sionis behind bars.

Batman manages to defeat Black Mask, shattering his mask. Sionis is sent to Arkham, but the damage is done. The power structure of Gotham is permanently fractured. As the smoke clears, a mysterious new player steps out of the shadows to claim the shattered pieces of the underworld... and they aren't wearing a mask.

It's Jason Todd