When a second Guardians of the Galaxy movie was announced, a lot of fans thought Adam Warlock would come into play. He's been a key player in the Infinity Gauntlet story, and there were hints of him in the first movie. However, now that Guardians of the Galaxy Vol. 2 has come and gone, we now know that Adam Warlock is not coming to the MCU until after the next two Avengers movies. In an interview with IGN, director James Gunn has revealed that Adam was in the original treatment, but was dropped early on:
"It was in the original draft — in the original treatment, before it even became a screenplay — Adam Warlock was a major character. And the screenplay was just too busy, there were too many characters. And I couldn't do Nebula justice and Adam Warlock justice and have them both in there so I decided to save Adam for another day."
The relationship dynamic between Nebula and Gamora was one of the parts of the original Guardians that should have been explored more. The fact that we got to see more of it in the sequel made the entire story feel that much more personal. Most of Guardians was about the concept of family, and Adam wouldn't really fit into that overall theme.
IGN went on to ask Gunn about the rumors that Matthew McConaughey was in talks for the role, but he shut that down quick:
"No, I mean, listen, I think McConaughey would be too old for the role of Adam Warlock. I get a lot of — Adam Warlock is basically a baby because he's just being born. So I get a lot of people giving me ideas for Adam Warlock online. I'm like, 'That guy's 65-years-old! How can you have him be Adam Warlock? He's a baby!' I got David Bowie all the time before David passed."
So it looks like whatever version of Adam we get, he'll be on the younger side.
Guardians of the Galaxy Vol. 2 will be 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.