Recent test screening didn't have him in the film. But guess we'll see
The Russo Brothers says they won’t confirm or deny if The Hulk will appear in ‘AVENGERS: DOOMSDAY’. “[Bruce Banner] is certainly involved in the story that revolves around Doom.” (Source: https://www.empireonline.com/movies/features/avengers-endgame-encore-new-scenes-explained-by-russo-brothers/)