On January 2 , 2018 , the first teaser poster was revealed , with a teaser trailer the following day . Reactions were mixed , with some online publications describing the trailer as taking a " traditional , low-budget horror route " . Other publications noted the film 's release coming four years after the Slender Man stabbing in Waukesha County , Wisconsin in 2014 . After the trailer 's online debut , Bill Weier , the father of one of the children convicted in the stabbing , protested the film 's production and release as " extremely distasteful " and advised local theaters to not screen the film . A second trailer was released on July 26 , 2018
Slender Man stabbing
Slender Man stabbing
Slender Man (film)