Tony Zucco - Batman: Arkham Origins

A prominent figure in Gotham's criminal underworld during the early years of Batman's career. 

Lucia Viti - Batman: Arkham Origins

The daughter of Carla Viti and sister of Jonny.

Carla Viti - Batman: Arkham Origins

Daughter of Vincent Falcone, Carla Viti (née Falcone) is the head of the Viti Crime Family and mother of Jonny and Lucia. 

Louisa Falcone - Batman: Arkham Origins

The wife of Carmine Falcone and mother of their four children: Alberto, Sofia, Kitrina, and Selina. 

Selina Falcone - Batman: Arkham Origins

The youngest daughter of Carmine and Louisa Falcone, Selina Falcone was put up for adoption when she just a baby. 

Sofia Falcone - Batman: Arkham Origins

The eldest daughter of Carmine and Louisa Falcone.

Kitrina Falcone - Batman: Arkham Origins

The daughter of Carmine and Louisa Falcone. 

Blockbuster - Batman: Arkham Knight: Genesis

An inmate at Arkham Asylum, Blockbuster was hired by the Joker, along with Catman, to impersonate Batman and beat the captured, psychologically tortured Jason Todd to death.

After Todd freed himself from his restraints, he overpowered Blockbuster and held him at gunpoint. 

Seeing his hesitation in pulling the trigger, he was shot and killed by Harley Quinn. 

Catman - Batman: Arkham Knight: Genesis

An inmate at Arkham Asylum, Catman, aka Thomas Blake, was hired by the Joker, along with Blockbuster, to impersonate Batman and beat the captured, psychologically tortured Jason Todd to death.

After Todd freed himself from his restraints, he overpowered and killed Blake, shooting him in the chest. 

Renee Montoya - Batman: Arkham Knight

 A detective with the GCPD. 

Harvey Bullock - Batman: Arkham Knight

A detective with the GCPD. 

John Jones - Batman: Arkham Knight

A detective with the GCPD. 

Crane Chemicals - Earth ???? - Suicide Squad: Kill the Justice League

An American chemical company. 

The Penguin - Earth ???? - Suicide Squad: Kill the Justice League

A member of Task-Force X recruited by Amanda Waller to stop Brainiac's invasion, the Penguin was killed when the Joker blew up the Hall of Justice. 

His trick umbrella was salvaged by the Joker. 

The Riddler - Earth ???? - Suicide Squad: Kill the Justice League

A member of Task-Force X recruited by Amanda Waller to stop Brainiac's invasion, the Riddler was killed when the Joker blew up the Hall of Justice. 

Hamilton Hill - Batman: Arkham Origins

Once the corrupt head of the Hill insurance company, Hamilton Hill, rose to power as Mayor of Gotham City through rigged elections funded by Rupert Thorne, Roman Sionis, and Carmine Falcone.

As a city councillor, Hill was discovered in a Gotham City Royal Hotel suite with two dead sex workers. Their bodies were dumped in Gotham Bay, and his allies covered up the crime—until the vigilante Anarky sought to expose him as a murderer and a fraud.

During the Red Hood Gang’s crime wave, Hill repeatedly promised the press that the GCPD would stop the gang within a year, but nothing came of it. 

His tarnished reputation was further damaged after the Joker’s Christmas Eve massacre, when many Gothamites called him out for being weak and ineffectual in a crisis. 

To deflect attention, Hill tried to appoint Peter Grogan as successor to the late Commissioner Gillian B. Loeb. However, Grogan was forced to withdraw after Enigma leaked evidence linking him to the Maroni Crime Family.

With mounting pressure and fearing his own crimes would come to light, Hill resigned on New Year’s Day.

Basil Karlo - Batman: Arkham Origins

A celebrated actor of both screen and stage, Basil Karlo was scheduled to perform a one-man show at the Monarch Theatre during December of Batman's second year.

Titled Funny Faces, the performance was a showcase of his talent for impressions and character work.

Renee Montoya - Batman: Arkham Origins

An officer of the GCPD, Renee Montoya, was called to investigate a disturbance at the Lacey Towers Penthouse on December 21st. 

Upon her arrival, she found two bodies: Roman Sionis, aka Black Mask, the penthouse's owner, and one of his girlfriends and drug traffickers, Tiffany Ambrose.

Securing the apartment, she discovered a $10,000 poker chip from the Final Offer casino had been left behind. Bagging it up, she sent it to the precinct to be processed as evidence. 

Arnold Flass - Batman: Arkham Origins

A corrupt detective in the GCPD, Arnold Flass, was an enforcer for Commissioner Gillian Loeb.

Used as a blunt instrument against honest cops, he was often assigned to intimidate and undermine anyone who threatened the unlawful status quo within the GCPD.

His violent tactics ultimately failed to break Captain James Gordon, and he was humiliated by the very man he tried to ambush, beat up and coerce. 

Because of this, both Loeb and Black Mask passed him over for promotions and future assignments.

Zatanna Zatara - Batman: Arkham Origins

The daughter of celebrated stage magician Giovanni John Zatara, Zatanna Zatara followed in the footsteps of her father and grandfather, becoming a highly successful performer specialising in illusion and mind-reading.

During the winter of Batman's second year, she was set to headline a one-night-only show at Gotham's Monarch Theatre. 

Zatanna was also scheduled to perform at My Alibi on New Year's Eve. However, due to civil unrest and rising criminal activity, the show was cancelled.