Avengers Endgame sets the stage for a possible Thanos Hulk rematch - but why did Hulk lose to Thanos at the beginning of Avengers Infinity War? Shouldn't Hulk's rage only grow for every hit he takes?

Credit: IGN Marvel star Paul Bettany has said the cast of Avengers: Infinity War only discovered the movie's heart-breaking ending as it was shot, and their beloved MCU characters were turned to dust.