The Slender Man is well on his approach to solidifying his status as a staple of mid 21st century repulsiveness fiction. His purposefully created urban legend is prime for matching with another mid 21st century ghastliness trademark, the “discovered footage” film.
The Slender Man’s genuine birthplace ties his myth to the Internet age. Enlivened by a challenge on the “Something Awful” site, client “Victor Surge” photoshopped the dark suited lean phantom into two photographs with a couple words about kids vanishing and the image snowballed from that point. The Slender Man mythos is much the same as Lovecraft’s Cthulhu Mythos in the way it is shared amongst numerous creators. Any individual who needs to can, and has, based on the Slender Man legend through recordings, fiction, craftsmanship, and computer games.