Shortly after the release of Guardians of the Galaxy Vol. 2, James Gunn confirmed that he will return to write and direct the film's sequel. Gunn hasn't divulged many plot details -- though he has hinted at the appearance of Quasar and confirmed that the third Guardians of the Galaxy movie will end "this iteration" of the team -- but he did recently reveal that he's having trouble reconciling one part of the established movie canon with his first draft of Guardians of the Galaxy Vol. 3.
"I'm writing Guardians of the Galaxy Vol. 3 and I finished the first draft of the treatment yesterday," Gunn revealed at the E3 World Building Panel. "I'm excited about it. I feel really great about it. But there's one little thing that I had in the first movie. Now, Marvel Canon -- MCU -- is crazy. There's the 616 universe which is the Marvel Comics Universe, which people get hung up on that canon, and then there's the MCU, The Marvel Cinematic Universe, which has a separate canon (inspired by but not exactly the same as the 616). I did something in the first movie of Guardians where it was in the background but it was distinctly there, and people know that it's there. And I'm like goddammit. Because I have a really good storytelling reason for breaking the canon, and I stayed up last night figuring out if I'm gonna do it or not. I still don't know."
Gunn later shared which scene is causing the problem. "In the first movie there is the mugshot sequence where the characters go through and they're going through the mugshots and having their picture taken. And the Nova Corps has information about each of the characters coming up on their machinery. Those things are something that your average viewer doesn't see at all. But there's a lot of background I put into those things about who they've worked with, where they're from, what's going on. And it's one of those things that I'm thinking about changing," he explained.
While it's still unclear exactly what piece of information he's referring to, Gunn's statements will likely drive speculation about what the next installment of the incredibly popular series might hold. First drafts often change quite a bit, but retconning -- the process of amending a series' or character's continuity to conform with existing plans -- is quite common in comics, so it's possible that Gunn might change a small piece of continuity in the MCU.
There's no release date currently set for a third Guardians of the Galaxy film. Now in theaters, Guardians of the Galaxy Vol. 2 stars Chris Pratt as Star-Lord, Zoe Saldana as Gamora, Dave Bautista as Drax the Destroyer, Vin Diesel as Baby Groot, Bradley Cooper as Rocket Raccoon, Michael Rooker as Yondu Udonta, Karen Gillan as Nebula, Pom Klementieff as Mantis, Elizabeth Debicki as Ayesha, Chris Sullivan as Taserface, Sean Gunn as Kraglin and Kurt Russell as Ego.