and b, how couldld batman fight superman since superman is an aliennnd way stronger and invulnerable? >> if you'd ra have a head to head, batman vs. superman punchup, we know who wins. >> reporter: "batman vs. superman" uses multiple story strains jesse isenberg's string-pullingpillian to put the do-gooders at odds. starting with a reprise of the end of "man of steel" and its destruction of the metropolis. >> you do have to realize that there is collateral damage which happens and someone's going to get blamed. that someone happened to be superman. see that, yeah, there's consequence. it would be amazing if bruce wayne witnessed that. >> he has the power to wipe o the entire human race. if we believe there's even a 1% chance he's an enemy we have to take it as absolute certainty and we have to destroy him. >> reporter: he takes on 32-year-old henry cavill's superman clark kent. affleck at 43 is the oldest ever to be past at bruce wayne. >> i wanted a batman that had been batman for 20 years. he had the experiences that we know sort of collectively in pop culture. i felt like that character had a chance against superman. because he could outthink h