It took a bit of research but I concluded Wolverine.
http://www.marveldirectory.com/individuals/w/wolverine.htmWolverine is a mutant with a number of enhancements to his physiology. Wolverine possesses heightened senses, making him capable of seeing things at a maximum distance greater than that of a normal human. His hearing is enhanced in a similar manner, and he is able to recognize people and objects by scent, even if that person or object is hidden. Logan can use these enhanced senses to track anyone, with an impressive degree of success.
He possesses retractable bone claws that are housed in his forearms, they are part of his skeleton system. At will Wolverine can release these claws through his skin between the knuckles on each hand. The skin between the knuckles tears and bleeds, but bleeding is quickly halted by his healing factor. The claws are naturally sharp and tougher than that of normal human bone structure. This allows Wolverine to be able to cut through most types of flesh and natural materials. (Note: While Wolverine possessed his adamantium skeleton, his claws were able to cut through almost any material without any fear of damage to the claws.)
Lastly, Wolverine possesses an accelerated healing factor based on his physiology. While most normal humans heal injuries over a long period of time, Wolverine's healing factor speeds up that natural process. Wolverine's natural healing has been advanced to the point where he can heal extensive injuries (such as broken limbs) in a matter of hours to days. This factor gives him a higher resistance to poisons and toxins, and he can recover from almost any injury. The more extensive the injury, the longer the healing time will be.
Wolverine is not immortal, however. If the injuries are extensive enough, especially if they result in the loss of vital organs, large amounts of blood, and/or loss of physical form (such as having flesh burned away by fire or acid), Logan can die.
Wolverine, again due to his healing factor, has an enhanced resistance to disease, as well as an extended life span. Despite Wolverine's chronological age, he is still as healthy and physically fit as a man in his prime.
Abilities: Due to his extensive training as a CIA operative, a Samurai, and as a member of the Weapon X program, Wolverine is a master of multiple forms of martial arts, weapons, and vehicles. He is also a trained expert in computers, explosives, and assassination techniques.
Now with all this in mind he not only pretty much matches our outmatches batman in hand to hand skill, but has extremely heightened sense of awareness and smell taking batmans advantage of stealth and disguise away. Wolverine is also resistant to any kind of gas type agent that batman might try to employ. All wolverine needs to do is land a hit one with those admantium claws of his while he could probauly stand to take literally a hundred punches from batman. Even in the bat mobile, lets say he hypothetically ran wolverine over, would not break any bones, wolverine probauly would just stick his claws into the car, climb up to the cockpit, rip it open and slice up batman. I think wolverine wins this round.