No no no, everyone is having a little scenario in their heads and each one is diferent. We need to know what kind of fight: With / without gadgets? With / without suits of armor? They know beforehand they are going to fight and who are they facing? Battle to death, uncionciousness, or until someone gives up? What is the arena? Wich versions of the characters? (ultimate, 616, Batman ink, year one, etc...) if we have this clear we can have a more defined panorama. My opinion: Hand to hand combat, no gadgets, no preparation?: Captain America. Open field and gadgets?: Batman.