All in a martial arts war. They are in a huge empty dojo with cement walls and nothing else. They are only allowed to fight in unarmed combat, no gadgets, weapons, or powers. Who comes out alive?
out of dc fighters here, only batman and Batgirl can go on, the rest would killed in first three seconds. Bucky too. out of the rest....i don't know. I think Daredevil is slightly beneath Cap and bat's level, so he's out. that leaves Batman, Batgirl, Iron Fist and Captain America. Anything goes.