Where is the Hulk?

      Where was the hulk in Avengers Infinity War? He only came out one time during the movie except Bruce banners face transformations through out the film. The beginning of Infinity war, Loki is about to give Thanos the space stone then he says "we have a hulk". Hulk comes out of nowhere and starts to fight with Thanos. He gets the upper hand on him at first. He just caught him by surprise. Thanos quickly retaliates and beats Hulk and breaks his nose.

      After this scene we never saw the Hulk, we expected to see him in the Wakanda battle but he never came out. Bruce banner had to take care of cull obsidian or black dwarf in the comics all by him self. People thought the Hulk was scared of Thanos but I think otherwise. We know from marvel studios themselves Bruce banner/Hulk will be going through a story arc in 3 movies: Thor Ragnarok, Avengers Infinity war and Avengers 4.

                                      

I personally think the Hulk/Bruce banner are having issues with understanding who's in power. Bruce would think Hulk would come at the last second like he always does. Maybe hulk is tired of that and wants to be appreciated more

My theory is in Avengers 4 they will end Hulk/Banners story arc with finally controlling the hulk.  I think Bruce banner and tony stark are going to make a suit to make so Bruce can control the hulk. It was showed in the Avengers 4 concept art. He will become professor hulk just like in the comics, having the strength of hulk and smarts of Bruce banner