The following contains minor spoilers for Bill and Ted Face the Music.
But it turns out that Face the Music also included at least one reference to another popular science fiction film outside the Bill and Ted franchise, one of the all-time greats, if not the greatest, 2001: A Space Odyssey.
Bill and Ted Face the Music is as solid an ending to the trilogy as fans could have hoped for, especially after waiting so long for it.
It gives the characters a satisfying ending and it also contains all the great franchise references that we would expect to see at the end of the story, meant for all the fans who have been there from the beginning to appreciate.