Here [1] are the box office results from 2018. Looking over the top 20 highest grossing movies I count 13 sequels/franchise movies, 3 standalone adaptations of existing IP, 2 remakes, 1 movie based on a well known true story, and only a single completely original movie. A company like 20th Century Fox is trying to make money and not necessarily make art. It is clear the best way to make money is through sequels and existing IP. Blame your fellow moviegoer for the repetition.

[1] - https://www.boxofficemojo.com/yearly/chart/?yr=2018&p=.htm