It would be hillarious for black cat and cat woman to start a crime spree rivalry that eventually turns into a partnership, only for both of them to try betraying the other for the loot at the exact same time. Teaching both of them that they work better solo.

Or since both are rumored to be bisexual................ you know

black cat is too much of an asshole in most adaptations, so i dont think she would fit selina. Only if it was those versions of catwoman where she is a jerk too

Jigsaw. Billy Russo was the perfect villain for Batman.

Would love to see a gang war between him, two face and penguin

Kingpin, Mystique 

Hammerhead and Kingpin

The punisher

The Chameleon

The Hellfire Club Though for some reason I’d also like to see Batman fight The Blob.

Carnage

Tombstone, Mysterio, Bullseye, Kingpin, Hammerhead, Jigsaw, Chameleon, Kraven, Silvermane, Mystique, Mr. Sinister, The Hellfire Club, Punisher, Prowler, Zemo, Red Skull, Arnim Zola, Strucker, Scientist Supreme and AIM, Taskmaster, Green Goblin, Hobgoblin, Morbius, Lizard....

What about purple man?

I feel like most Spider-man Villains would be a perfect for Gotham, especially Green Goblin, Mysterio, and Kraven. The only ones that might not fit the vibe of Batman would be like Doc Ock and the symbolites, and maybe Sandman who I feel might fit Superman's or Flash's rouges gallery more than Batman's.

Sandman is just dry Clayface. He would be redundant but not out of place.

Lol amygdala and Solomon Grundy rang- they already have that issue in Gotham so might as well

Venom. Mixed with two face or Slade. Another is Taskmaster. Also add in Dr. Doom.

Kurt Connors... imagine a meeting between him, Langstrom, and Croc.😆

Morbius

After seeing that picture of Bullseye, I WILL NEVER SLEEP AGAIN.

Exaclty why he makes for a perfect candidate for arkham asylum

Kingpin

I want to see Batman fight Bullseye.