In a nutshell, the documentary celebrates the legacy of Stan Lee, who helped to craft and propel Marvel Comics and narratives since 1939.
Stan Lee, born December 28, 1922, and died November 12, 2018, was a creative pioneer of his family company Marvel Comics, formerly known as Timely Publications. He, along with other collaborators co-created Marvel's iconic characters, including the X-Men, Iron Man, Spider-Man, Hulk, Ant-Man, Fantastic Four, Thor, Doctor Strange, Black Panther, Daredevil, Black Widow and Scarlet Witch.
After he retired from the comic world in the 1990s, Lee remained a prominent figure in the Marvel Cinematic Universe, serving as an executive producer of the live adaptation films until he died in 2018.
A diehard Marvel fan can attest eagerly awaiting to see Stan Lee's cameo appearance in every MCU and non-MCU installment. The last cameo he filmed for the MCU was in Avengers: Endgame, which premiered in 2019.