Which brings us to the above moment that was shown in the first Avengers: Infinity War trailer, where Hulk is charging into battle alongside his allies. Obviously that moment never occurred in the movie, but rather than simply being filmed to fool audiences, this was originally intended to be an actual scene, only rather than getting more of normal, angry Hulk, that’s a Hulk with significantly improved intelligence who’s getting ready to kick some ass.
Article source: https://www.cinemablend.com/news/2471274/the-important-hulk-story-that-almost-showed-up-in-avengers-infinity-war