Batman was well known for his regular tours of Arkham Asylum. The purpose of his visits was to check on his rogues. Being an expert in profiling and criminology, and simply because he knew them, Batman was able to predict if one of his enemies was planning to bust out solely by observing their mood.

At the beginning of his carrier, Batman had to sneak inside the building, because he was still regarded as an outlaw and a potential patient for the asylum. Nowadays, he could just walk in through the front door like he owned the place. The medical staff and security guards would all follow his orders almost without question.

Today however, the purpose of his visit required him to enter discretely through the back door.

Batman had quite a few meta-human rogues, among who counted mutants like Killer Croc, Man-Bat or Copperhead. A great advantage of Ivo'a technology was that Amazo, and by extension Bruce himself, could switch his different powers on and off. So if he copied the powers of someone with a physically visible mutation, Batman would be able to change between his normal self and one of his mutated forms at will. But that kind of power would be redundant once he managed to copy Martian Manhunter's shape-shifting.

A more useful source for new powers would be Deathstroke. The mercenary was a common enemy to Batman, Green Arrow and Nightwing. Obtaining Slade Wilson's powers could seem redundant if he could duplicate Wonder Woman's. But the Amazon's powers were based on magic and thus could be temporarily disabled given the right circumstances. However Deathstroke wasn't a patient of Arkham Asylum and wasn't incarcerated anywhere else.

Batman also had a common foe with Hawkman. Gentleman Ghost was, as his name implied, a ghost and his powers could be extremely useful. Unfortunately this villain was still on the run and wouldn't easily be found.

Which only left Batman with two potential targets to copy powers from. Clayface and Poison Ivy were both currently residing in the asylum.

Clayface's powers would definitely be a good addition to his arsenal. Even though they seemed redundant with respect to J'onn's powers, there were a few  significant differences that would actually make them complementary. Besides Clayface was definitely an easier target than his Martian colleague. However entering the villain's cell could be risky, not to his life but to the secrecy of his mission. Since he had to touch Clayface to copy his powers, the action would surely lead him into a noisy battle.

Poison Ivy would be easier to deal with, as he could find a way to persuade her to let him leave peacefully. And her powers were definitely worth any payment she might ask of him: control over plants; controlled production of toxins, pheromones and other chemicals inside her body; enhanced immune system and resistance to poisons. Also he seriously considered adding Poison Ivy to his list of lovers.

Batman thought about his next move.