The X-Men prequels may have depicted the famed Marvel mutants in dynamic narratives, but watching them in hindsight reveals some less favorable aspects that Marvel should be cautious of while preparing for the MCU’s X-Men movie. The X-Men prequel series began with X-Men: First Class, which intended to depict the initial formation of the famed mutant heroes. This proved so popular that an entire movie franchise was established. While the X-Men prequels revitalized the franchise after the disappointing conclusion to the original trilogy, they were by no means perfect.

https://screenrant.com/fox-x-men-prequel-series-harsh-realities/