James Gunn has disclosed the long-anticipated origin story of Rocket Raccoon and Groot in the Marvel Cinematic Universe. In his final MCU film, Guardians of the Galaxy Vol. 3, Bradley Cooper's Rocket takes center stage as the beloved character. The movie delves into Rocket's past and introduces his childhood companions, providing a richer understanding of his persona. Continuing this trend, Gunn now unveils the heartfelt tale of the initial encounter between Rocket and Groot on various social media platforms.