It seems like there should be subtypes of sequels.
The chapter type (where it really isn’t a sequel, but another part of the same story)
LOTR, The Godfather- I want good acting, good direction, just a good quality film that flows well with the first and makes you want the next.
Does the matrix fit in this category? Was it initially written as one whole story?
The blockbuster type (where the first one was good, so make another one, and blow more shit up)
Die hard franchise, rocky franchise, Lethal weapon franchise, jason, freddy, American pie, etc.
In those, we just need bigger, better, more shit getting blown up, stabbed, or glued to the private parts of the protagonists.
The best, IMO: Indiana Jones franchise
It seems like Star Wars and Star Trek, and the like belong in another “oportunistic chapter” category
Like there’s more chapters to the story developed because there’s a market for them.
I think those have to be a really good balance of staying true to your audience, creating surprises, utilizing new technology, etc. A really hard thing to do, as evidenced by star wars.
Maybe the Matirix fits here, I don’t know enough about the process of that one.