For a trilogy of films, there are six possible orderings of quality, assuming that no two films are the same quality.
For instance, a trilogy that gets better with each movie would be 321 (third best, then second best, then first best). A trilogy that gets worse with each movie would be 123 (best, then second best, then third best).
There are six possible such combinations. Can we think of a trilogy that fits into each of those six? (It’s obviously a bit amorphous what really counts as a trilogy… so don’t just pick three consecutive movies out of a longer series unless there’s something that clearly groups them into a triad. And ideally, the rating should be based on IMDB or RottenTomatoes scores, not just your personal opinion.)
I’m also curious what the most and least common orderings will be.
To start with:
321 - Star Wars eps 1-3
123 - Godfather trilogy
213 - Tobey Maguire Spiderman movies, Xmen 1-3, Star Wars 4-6
312 - Christopher Nolan batman movies
132 - Iron Man 1-3, Indiana Jones original trilogy
So we stll need an examples of 231 (starting with the second best, then third best, then best).
Two prominent trilogies that don’t seem to have enough of a critical consensus to fit into a category, imho, are Toy Story and Lord of the Rings.