James Gunn, the writer and director of Marvel's Guardians of the Galaxy Vol. 2, has dropped a major hint about the origin of Rocket Raccoon.

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Asked by a fan on Twitter who he thinks might have created the fan-favorite character, Gunn revealed the answer is actually hidden within the blockbuster Marvel Studios sequel.

In the comics, Rocket was genetically engineered to serve as a security guard for the insane asylum on Halfworld in the Keystone Quadrant. He first hinted to this origin in 2014's Guardians of the Galaxy, when he mentioned that he didn't ask to be created. Given Gunn's proclivity for moving his characters away from their comic book counterparts, such as with Mantis' personality and the identity of Peter Quill's father, it's possible that Rocket's origin could have been altered as well.

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Guardians of the Galaxy Vol. 3 isn't expected to hit theaters until 2020, but Rocket and the Guardians will be seen in Avengers: Infinity War due out on May 4, 2018.

Directed by Joe and Anthony Russo, Avengers: Infinity War stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie.