Director Sylvain White (“Stomp the Yard,” “The Losers”) doesn’t have much to work with in “Slender Man,” and he knows it. The PG-13 horror story is an expansion of an internet creation intended to give readers the willies and inspire a viral-like obsession with creative representation. The Slender Man myth is meant to be a campfire story, avoiding a deeper inspection of what exactly a creature that looks like Jack Skellington is meant to do. Screenwriter David Birke doesn’t develop the elusive apparition and White tries to bury what amounts to 90 minutes of nothingness in style, repeating the same shots and ideas for suspense until the end credits roll. “Slender Man” isn’t as tasteless as feared, but it’s about as languid as expected, becoming yet another nondescript genre offering meant solely for the sleepover demographic. Read the rest at Blu-ray.com