Moment From Captain America: Civil War
In order to cause a distraction big enough so that Captain America and Bucky can make it to the jet, Ant-Man alters his regulator to grow huge and become Giant-Man.
Following the events of Age of Ultron, the collective governments of the world pass an act designed to regulate all superhuman activity. This polarizes opinion amongst the Avengers, causing two factions to side with Iron Man or Captain America, which causes an epic battle between former allies.
Tags: civil war, sequel, superhero, based on comic, aftercreditsstinger, duringcreditsstinger, marvel cinematic universe