In the below Avengers: Infinity War trailer, we see Hulk running with Cap & co. in Wakanda (about 1 minute 59 seconds in).
However, in the movie itself, we
never see Hulk after Banner lands on Earth early in the movie. In the Battle of Wakanda, Banner wears the Hulkbuster suit the whole time, and never transforms into the Hulk.
Obviously, many things can change between a trailer’s release and the actual movie (see, for example, Rogue One), especially things that are mostly made of special effects. But are there any comments from the filmmakers discussing details of how, and perhaps why, this changed between that trailer and the movie?