One of the bands mentioned on the flyers seen in the film is "The Aynsley Dunbar Retaliation." Dunbar would later be famed for playing with artists like David Bowie, Journey, Jefferson Starship, Frank Zappa, and Whitesnake. Early in his career, Dunbar drummed for John Mayall's Bluesbreakers, a band that featured some of the earliest work from artists like Mick Fleetwood and Eric Clapton. When Dunbar was fired from the band, he called his next band "Retaliation" as a way of chiding Mayall.
Some of the vintage flyers shown in the film feature the caption "Don Arden Productions." Don Arden was an infamous and legendary record company man and band manager, but is probably best known for being the father of Sharon Arden (later Sharon Osbourne), and of course, the future father-in-law of Ozzy Osbourne.
Announced in 2019, the documentary had its preview at the Venice Film Festival of 2021, as a work-in-progress.