See previous discussion here when someone asked about a Fediverse equivalent of Discogs.
The state of play, as far as I am concerned, based on talking about it over there, chewing the idea over and doing some digging:
This has been proposed a few years back and nothing came of it but it feels like the idea is gaining momentum.
The developers of BookWyrm definitely think that it is perfectly possible to take their code and adapt it for films to make a Fediverse IMDb/Trakt equivalent (FilmWyrm? MovieWyrm?) but they don’t have the time to do it.
Rather than keep reinventing the wheel (“What about a Fediverse Discogs?”, “What about a Fediverse comic book database?”, etc) it might be an idea to first take BookWyrm and make it more modular, so it would then be easier for people to spin off their own projects: DiscWyrm, ComicsWyrm, MovieWyrm, ActionFigureWyrm, AnimeWyrm, etc. I proposed calling it GeneralWyrm.