Forrest Gump, but set in the baroque era or some other time when there was a new popular style of music that's now considered classical... toss in some made-up cultural references to stuff that could have plausibly been in vogue then, and have the hero run across some of the bigger historical events of the time; stuff many people today would not have heard of. But treat it as very well known stuff.
Because 200 years from now, how much of Forrest Gump will be understood without Cliff's Notes or footnotes in the "margins"?
Also: music video for "The Ballad of Barry Allen" but shot with a person living a humdrum day and daydreaming the rescues, instead of actually doing them. I think it could work.