Why are there so many movie sequels?

Hollywood doesn’t invest in one movie or in one monster anymore.

It invests in worlds.

Avengers: Endgame didn’t become the highest-grossing opening weekend movie of all time because it was the best movie of all time.

No, it was because the audience had to heavily invest in the series by watching 20 movies beforehand to get the joke.

The lesson to take away is this:

Hollywood understands that not everyone is going to see Avengers and that’s fine. Because they made it for the ones who are willing enough and weird enough to dive into.

Create a world and a journey for those you seek to change.