There’s a weekly “upcoming releases” post. A place to start for that could be having a list of everything coming out for the coming week or two for each of a few major regions. So you can skip to your region and see what’s going on. Then, for each release, it has a link to the most recent comments thread relating to each movie, and a link to the RT page and what the RT rating is.
I like the idea, but which link would you use in this scenario, to make sure that people can access it whatever their instance? https://lemmyverse.link/?
If there’s a movie that’s coming out that doesn’t yet have a thread discussing it, and it’s above a certain score threshold on RT, then it makes one. That way there’s always some kind of thread that it can link back to.