Marvel steps in to show DC how superhero conflict is done. This smartly written action flick bristles with contemporary moral quandaries. And yet it's fast, fun and light on its feet. Seems that the near disastrous events of the last Avengers movie have made many question the whole idea of superpowered heroics. Tony Stark (Robert Downey Jr.), for example, thinks heroes should now be regulated by the U.N. Captain America (Chris Evans), on the other hand, thinks otherwise. What follows is a head-to-head battle that forces a lot of familiar faces (and a few new ones) to choose sides. 146 minutes PG-13.