Fox needs to reboot The X Men Movies without Bryan Singer doing terrible job at making up his own storylines with X-Men 1,2 & Days of Future Past.. They should had at least follow the comic books a little bit in the films.
Wait... what. Making his own story lines? What are you talking about? He adapted them to fit his universe and changed things around but other than the first one all of the X-Men films have been based off comic story lines, including Singers
X-Men 2 is based on God Loves, Man Kills
X-Men 3 is based on The Dark Phoenix Saga
X-Men: First Class is based off, you guessed it, First Class
X-Men: Days of Future Past is based off Days of Future Past
X-Men: Apocalypse is going to follow on from there
X-Men Origins: Wolverine was based off of the Wolverine origin comic that's name escapes me
The Wolverine was based off the wolverine comic from the 80s (most of those stories were written by Chris Claremont, who did the majority of X-Mens best known stories)
There are differences as with all adaptations but the core plot elements remain the same, the movies didn't invent stories. They're ALL based off storylines from the comics, except I
think the first one.