Re: wat if they built up to x men, like avengers?
Because if there's a 1st X-Men movie, people would be looking for a couple of characters. Not an origin story just for 1 X-Men character. Whether its the cartoons, videogames or a film series, they would always start it with the X-Men already assembled. Then the flashbacks/origin stories come in later.
X-Men already assembled = more appealing to the mainstream viewers
Origin story for 1 single character = not so much especially if its not Wolverine
X-MEN RI5E' MUTANT OF THE MONTH | CYCLOPS | PORTRAYED BY JAMES MARSDEN
"Stay away from my girl" - X1
"You don't say that, we gotta go back" - X2
"Not everybody heals as fast as you" - X3
"Easy pal" - X4