Basically Hugo Strange/Jeremiah Arkham and Ashley Kafla have the bright idea of pooling their resources together and merge Arkham and Ravencroft into one high tech facility in either Gotham, New York or elsewhere where the Batman and Spider-Man Rogues (the two greatest rogue galleries in fiction?) are now all under the same roof. Is it likely to do better with staff from both or make something much worse? And what would your favorite Batman Rogues/Spidey Rogues interactions be?
I definitely would love to see an encounter between Kraven and Bane for one thing. Doctor Octopus and Mister Freeze can compare notes. Harley Quinn and White Rabbit will become BFF's. Lizard and Man Bat strive to learn from the other's mistakes, whilst Hammerhead and Two Face just want to shoot each other...