Niko and Lev's Crew - Batman & Robin

A small-time gang of Russian drug dealers and people smugglers, they wanted to make a name for themselves by cornering Gotham's overcrowded drug market. 

They partnered with Le Cirque D'étrange, helping them to spread their virulent identity-destroying compound throughout the city. They would often test the product on the young women they trafficked, forcing them into sex work. 

After Batman and Robin disrupted one of their deals, Niko and Levi planned to flee Gotham until the heat died down. However, Professor Pyg, Le Cirque D'étrange's leader, saw this as a betrayal and took revenge against them. 

Their operation was shut down by Batman and Robin. 

Members: 

1. Levi
2. Niko

Masks of Evil - Batman & Robin

A crime-thriller novel written by the late Oberon Sexton. 

Clara Saberton - Batman: Arkham Knight

The personal secretary of Bruce Wayne, Clara Saberton, remained behind in Gotham during Scarecrow's Halloween siege. In the relative safety of Wayne Tower's top floor, she continued working for Wayne and Lucius Fox. 

She was deceived by Thomas Elliot, aka Hush (nee the Identity Thief), who was impersonating Bruce Wayne. Mistaking him for her real employer, she was surprised to see him, believing he had evacuated the city hours earlier.

Minutes later, after hearing a disturbance coming from Wayne’s office, Clara went to investigate—only to be shot at by “her boss,” who had taken Fox hostage.

Convinced that Bruce Wayne had gone insane, she was relieved by Batman's appearance, begging the vigilante to save Fox. 

With the building still under lockdown, Clara fled to the lower floors, reasoning they were still far safer than Gotham's besieged streets. 

Officer J.T. Wicker - Batman: Arkham Knight

A corrupt officer in the GCPD, JT Wicker, has been working as a mole and informant for the Riddler for years, helping Nigma stay one step ahead of the police and feeding him inside information that he could use against them. Their partnership started ten years ago, when Nigma, then going by the name Eddie Nashton, infiltrated the GCPD as the head of the Cyber Crimes Unit. 

In the runup to Halloween, and Riddler's latest scheme against Batman, he planted several of Nigma's trophies throught GCPD headquarters.

When Batman discovered Wicker’s ties to the Riddler, he confronted the officer, demanding he reveal everything he knew about Nigma’s plans. Unable to convince his fellow officers that Batman was lying, Wicker confessed, shocking and disgusting his colleagues. 

He spent the rest of the evening locked in a holding cell. Wicker attempted to garner sympathy from his colleagues, claiming he was a triple agent and acting on Gordon's behalf, though no one believed him. 

Realising he had no allies, he dropped his act, lashing out at Batman. He called out Batman's hypocracy and brutal methods, blaming him for Riddler's mental breakdown and obsession with humiliating, unmasking and killing the vigilante. 

"The Starfish Freak" - Batman: Arkham Knight

Known as "The Starfish Freak," he was once a construction worker at Seagate Amusement Park who became possessed by one of Starro the Conqueror’s Star-Spawn. After turning violent and attacking his fellow workers, he was eventually subdued, and both he and Starro were imprisoned.

At Jack White’s suggestion, Edward Burke planned to feature them as the main attractions of the park’s freak show, emphasising the man’s loss of bodily autonomy and marketing him as “more beast than man.”

After Jack White and Dr. Harleen Quinzel persuaded Burke to take his own life, shortly after he signed over the deed to Seagate, some believe that the Starfish Freak was stored away alongside Starro. 

However, most assume he was killed when the Joker halted all construction plans and turned the park into his latest hideout.

Maxie Zeus - Batman: Arkham City

While a patient at the Elizabeth Arkham Asylum for the Criminally Insane, Maxie Zeus vanished without a trace. Although there are no official records detailing what happened to him, staff widely acknowledge that he was routinely subjected to electroshock therapy, with some theorising that he died as a result of these treatments.

Others claim he escaped not long before the Joker’s “Homecoming Party” and now resides within Arkham City, leading a gang from his former nightclub, the Gotham City Olympus. 

Maxie Zeus' Cell - Batman: Arkham Asylum

The permanent cell of Maxie Zeus, situated in Arkham Asylum's Intensive Treatment Building, is directly adjacent to Patient Pacification and the ECT room. 

Zeus decorated the walls with symbols and glyphs from different ancient cultures, including Greek, Roman and Egyptian.  

Humphry Dumpler's Grandmother - Beware the Batman

The grandmother of Humphry Dumpler lived in Gotham City until her death under mysterious circumstances. 

After escaping police custody and going underground, Dumpler took up residence in her home at 15 Hawthorne Avenue, using the basement to construct lethal mechanised toy soldiers that he would use in his revenge scheme against all those who had hurt and abused him. 

Humphry Dumpler's Mother - Beware the Batman

The mother of Humphry Dumpler, she moved from Gotham to Star City. 

She is registered as missing and presumed dead. 

The Watchtower - Earth 50 - The Multiversity Guidebook

The headquarters of the Justice Lords, The Watchtower, uses the satellite to carry out worldwide surveillance, aiding the "heroes" in suppressing free speech and democratic elections.

Earth 50 - The Multiversity Guidebook

Designated Earth 50, this world became a global police state after Superman murdered President Lex Luthor. Order is maintained by the newly formed Justice Lords, who ruled through fear and tyranny. 

The Lords' extreme methods were challenged by Batman, who went into hiding, waging war against his former friends and allies, whom he believed were lost causes. 

The Love Syndicate of Dreamworld - Earth 47 - The Multiversity Guidebook

Native to Earth 47, the Love Syndicate of Dreamworld is a superhero team bankrolled by President Prez Rickard. 

Members: 

• Sunshine Superman
• Shooting Star
• Magic Lantern 
• Speed Freak
• Brother Power, the Geek

Associates: 

• Prez Rickard

Prez Rickard - Earth 47 - The Multiversity Guidebook

The immortal teenage President of the United States, Prez Rickard, served as the financial backer of the Love Syndicate of Dreamworld. 

Earth 47 - The Multiversity Guidebook

Designated Earth 47 in the Multiverse, this world is known for its distinctive psychedelic aesthetic. 

Deadman - Earth 13 - The Multiversity Guidebook

Deadman is a member of the League of Shadows. 

Enchantress - Earth 13 - The Multiversity Guidebook

Enchantress is a member of the League of Shadows. 

Kamelot - Earth 13 - The Multiversity Guidebook

The homeworld of Etrigan, the planet Kamelot, was destroyed in a cataclysm that nearly wiped out his entire race.

He survived by being rocketed to Earth.

The League of Shadows - Earth 13 - The Multiversity Guidebook

A team of heroes from Earth-13. 

Members: 

• Etrigan, aka Superdemon
• Hellblazer
• Annataz
• Witchboy
• Swamp-Man
• Fate
• Ragman
• Deadman
• Enchantress

Earth 13 - The Multiversity Guidebook

One of the 52 known worlds in the Multiverse, Earth 13 is deeply tied to magic and sorcery.

Shrouded in perpetual twilight, it differs from other worlds with 13-hour days and an extra month each year. 

Durla - Original Timeline - Young Justice: Phantoms

In the 31st century, ten years after General Zod and his Kryptonian army were released from the Phantom Zone, Durla was conquered and enslaved. 

Because of this, a time-displaced Chameleon Boy, a member of the Legion of Superheroes and native of the planet, had reservations about releasing Zod in 2020, fearing they would enact this a century earlier than in the previous, untampered timeline.