[Poe969]

I read that it wasn't because Hulk got beat up that made him not come out. The Russo brothers said it's more of he's resenting Bruce and everyone because they only want him when they need him, he doesn't feel like part of the team. It goes back to Thor Ragnarok where Thor had the same conversation with both Bruce and the Hulk about how he likes whichever one he's talking to at the time and not the other. Marvel is working towards a Hulk where him and Bruce can work together and help each other instead of the two of them always at odds.

As for the scene where everyone is running in Wakanda, it was never going to be in the movie, they just wanted a shot of all the main heros together for advertising just like the shot of Iron Man flying with Spider Man in homecoming that was in adds but not the movie.