Equus - Earth-TUD25 - Superman & Lois

An enemy of Superman.

Atomic Skull - Earth-TUD25 - Superman & Lois

An enemy of Superman. 

Titano - Earth-TUD25 - Superman & Lois

An enemy of Superman.

The Shade - The Flash

A meta-human supercriminal with the power to transform himself into pure shadow, the Shade became an enemy of the Flash after he murdered a businessman and terrorised Central City. 

He was stopped by the Flash during a late-night showing of The Shining and sent to Iron Heights. 

Jorge Heart - The Flash

The brother of August Heart, aka Godspeed. 

Louise Lincoln - The Flash

A former colleague of Thomas Snow. 

Amanda Choi - The Flash

The wife of Ryan Choi and mother of their infant daughter, Simone. 

Ringmaster - The Flash

A supervillain and enemy of the Flash. 

Barney Sands - The Flash

The owner of Crossover Comix & Collectables.

James Gordon Jr - Batwoman

The son of Jim Gordon and Barbara Kean, James Gordon Jr (J.J.), was diagnosed clinically insane after he killed a labradoodle at age 15, tying the poor animal to railway tracks and watching a train run it over. 

This pattern would continue, eventually culminating in his parents discovering body parts hidden in his closet. 

Fearing public scandal, Barbara had him undergo treatment with highly dangerous experimental medication. His exposure to these chemicals left him with irreparable brain damage. 

James was moved to Arkham Asylum, where he remained in a vegetative state.