Red Letter Media are an ensemble of online movie critics who gained YouTube fame with their "Mr Plinkett" deconstructions of the Star Wars prequels. Here they review the new Bill and Ted movie, which I haven't seen, but which relates the now middle-aged characters in their still unrealised quest to create the perfect piece of music that will align the planets and bring peace to the world, as foretold for them in the earlier movies from the 1990s. It appears the film's representation of this draws upon the mythology of Brian Wilson and Smile (a bit like Walk Hard: The Dewey Cox Story), at least to the extent that Keanu Reeves is shown playing a theremin. Certainly the implication is noted by one of the two reviewers, who conveys his understanding of Brian's career in 1966-67 to his sidekick, who is not familiar with the subject. Sadly the review does not feature the most talented of the RLM-ers, Mike Stoklasa.
https://youtu.be/3tx33tgXT3M?t=912