Best of luck on this new project, Loss. I read your comparison to sites like Spotify and Allmovie and it put some ideas in my head.
So most of us are probably familiar with ProfightDB. It's a website with a database of wrestlers and cards that shows you a wrestler's entire history of matches. It's a pretty great resource. But what if there was a database for the matches themselves? Like, if you were looking at the card for Summerslam '92 and you clicked on the page for Bret Hart vs British Bulldog and it brought a wealth of content related to the match - Meltzer's star rating, user-submitted reviews, trivia ("According to Hart's autobiography Hitman: My Real Life in the Cartoon World of Wrestling, Bulldog spent the weeks leading up to Summerslam smoking crack with Jim Neidhart"), where to stream the match and where to view it on DVD (for WWE this is easy, but for indies there might be a need for a feature like this). What if you could view a list of all Bret vs Bulldog matches - and narrow it down to singles or tags. What if you could sort certain matches by keyword or keyphrase - for instance if you were on the page for Bret vs Hakushi on Raw in July '95 and one of the keyphrases was "space flying tiger drop" and if you clicked it you saw a list of other matches with that keyphrase. (You know, for all those smarks who think a match isn't good unless it contains a space flying tiger drop.)
This is all a bit pie-in-the-sky and it would take a lot of work (and I don't even know what kind of database software would be required to handle it). I don't know if any of these ideas match up to what you're planning but I think there's an opening in the market for a site like what I just described.