Originally posted by MrMindTony Jaa probably.
...the only action film actor with legit fighting skill and athleticism was Bruce Lee
Batman wins. His only challenge would be in Jean Claude Van damme, or in real life Van Varenberg. Chuck's style is too slow, and Seagal would simply be met by a style greater than his own by a guy strong enough to lift the Big Show off the ground with one arm. Not really fair. Batman is super human by our standards.
Chuck Norris is actually legit. He was one of the few martial artists that didn't let his ego get in the way of evolving in the modern era. He is a black belt in jui jutsu under the freakin' Machado Brothers(Eddie Bravo's teachers, who trained Tony Ferguson, who we all want to see fight Khabib) and has trained with Rorion and Rickson Gracie. Chuck was already a judo black belt as well. Even in his old age, I'd imagine his grappling alone would be enough to **** up most people.
Van Damme was a legitimate kickboxer before going into acting. He's not as well rounded as Chuck, but he did have a striking background.
Steven Seagal is just an actor though. His aikido background is legit, but aikido is about as useful as dance lessons in a fight, possibly even less so. A dedicated dancer could get pretty athletic and gives you movement ability, which Lomachenko has proven.
Bruce Lee's skills are mostly unverified though. He has legit techniques, like guillotine chokes, crucifixes, belly down armbars, and double leg takedowns in his movies. I assume he has some knowledge, but can't be certain if he could implement it without evidence.
Batman kills all of them though. Comic book martial artists are superhuman in the real world. They wouldn't even be able to react to him and he could one shot everyone here.