So the Russos and the writers have been doing a lot of Q&As about the movie lately. Here's a round-up of all relevant information.
>Robert Downey Jr. and Chris Evans are both done with the MCU and there are no plans for bring them back in the future.
>Smart Hulk would appear during the Battle of Wakanda in INFINITY WAR, but it did not feel right to have Banner have a win when everybody else lost. Several drafts featured Banner’s experiments in the gamma laboratory before it was ultimately decided to just jump right into it, with Ant-Man as the audience surrogate asking “WTF is going on?”
>There is a deleted scene detailing what Hulk has been up to in terms of crimefighting during the five-year jump, but it felt superfluous.
>Hawkeye was left out of INFINITY WAR because “reluctantly leaving his family to fight” would just be a retread of his CIVIL WAR arc and he would have no greater impact in the Battle of Wakanda. His family being dusted was also planned for INFINITY WAR to show the global effect of the snap, but the Russos decided it undermined the urgency of what was going on in Wakanda.
>There is some deleted content about Hawkeye in Japan leading up to his reunion with Black Widow.
>Doctor Strange VS. Thanos in INFINITY WAR was originally much longer and trippier, and included an appearance from the Living Tribunal watching from afar as they fought across dimensions, but everyone felt it was too weird with proper context.
>Earlier drafts detailed Thanos’ flashbacks in 10 minutes worth of flashbacks, some of which were shot before the whole thing was cut for being superfluous. They revealed that Thanos was an aberration due to his appearance and was sent to a space gulag for years due to his extremist ideas, during which his race died out as he predicted. It was in prison that Thanos began building his criminal empire.
>Vision is dead as far as the Russos are concerned, and there were no plans to revive in ENDGAME.