The history about the Terry Gilliam's Don Quixote fiasco is legendary, I haven't seen this film yet, but I had to pick it up for this price.
Fun Fact: Lost in La Mancha is a 2002 documentary film about the making of Terry Gilliam's first attempt at The Man Who Killed Don Quixote... The documentary was shot in 2000 during Gilliam's first attempt to make the film, as an intended work of the genre known as the "making-of". But Gilliam's failure to complete his movie resulted in the documentary filmmakers retitling their work as Lost in la Mancha and releasing it independently.
Lost in La Mancha presents Gilliam's effort to make Don Quixote as a parallel to Quixote's quest to become a hero. It co-stars Johnny Depp, Jean Rochefort, and Vanessa Paradis, who were cast as stars for The Man Who Killed Don Quixote. It is narrated by Jeff Bridges.
Gilliam ultimately succeeded in making The Man Who Killed Don Quixote, which was released in 2018. Fulton and Pepe have made a follow-up documentary, titled He Dreamed of Giants, which will cover Gilliam's entire scope of work on the Quixote project. It is in production.