3) Poison Ivy (aka Dr. Pamela Isley)

"Scarecrow said he had a plan. That altogether, we could take you out."

Poison Ivy (aka Dr. Pamela Isley) has an obsession with plants. Her second passion is in erasing mankind from the planet so Mother Nature can prosper.

Poison Ivy was once a renowned botanist until a laboratory accident transformed her. She terrorizes Gotham through manipulation of poisons, man-eating plants, and pheromones. With a single kiss on the lips, the toxins on Ivy's body will either kill the victim or transform them into mindless servants to do her bidding. Poison Ivy has been a formidable opponent for gamers in two previous Arkham games.

Batman took her down in Arkham Asylum, and Catwoman survives Ivy's traps in Arkham City. On June 23, Batman: Arkham Knight will mark Poison Ivy's third appearance in the franchise. Remember to stay away from the flowers.