Sometimes directors really need to fight for a scene in a movie. We found out that Patty Jenkins had to fight to keep the No Man's Land scene in the movie. It's not uncommon and sometimes directors don't always win the fight. For James Gunn he had to fight to keep a certain after-credits scene in Guardians of the Galaxy Vol. 2. He told Cinema Blend that the best way to convince Marvel that it was going to be okay was being frank with the audience:
"I had to fight for Adam in the post-credits sequence. Because I really thought that's where that should go. And I thought one of the main reasons to have the Sovereign in the movie was to give audiences the hint that Adam Warlock is coming. That was one of the reasons for them to exist. And I wrote that post-credits sequence in the first draft of the script. And then there were a lot of questions about whether or not we should put that in there, because people were going to expect Adam Warlock in Infinity War. So one of the things I promised — which I do all of the time on Twitter — is letting everyone know that Adam Warlock is not going to be in Avengers 3 or Avengers 4. It's just not going to happen. Because I didn't want people to have false expectations of what they thought was going to happen with Adam."
Gunn knew that people would expect Adam Warlock in Avengers: Infinity War, and when he pitched that he would be honest with the audience and tell them that Adam wasn't going to be in Avengers 3 or 4, it would be okay. There were some people that weren't happy when they found out that Adam is skipping Infinity War, but Gunn clearly has plans for the character in the third installment of the series.
Guardians of the Galaxy Vol. 2 is released digitally in HD, 4K Ultra HD, and Disney Movies Anywhere on August 8th and physically on 4K Ultra HD, Blu-ray, and DVD August 22nd.