Read The RestIn order to convey that the X-Men are smaller, less-known characters in the Marvel Universe compared to The Avengers and The Amazing Spider-Man, director Bryan Singer has been given to describe the “X-Men” of late as the “bastard stepchild of the comic-book universe.” And while the X-Men are far from underground or on the fringes, perhaps Singer’s comments do have a tiny bit of merit. While his latest X-picture, “X-Men: Days Of Future Past,” did open to $90.7 million this weekend, that’s far below the forecasted $100+ million the soaring reviews helped project; the film did fall below the…