Another Slender Man movie is being made. And the official trailer came out today. Pretty much everyone knows who Slender Man is already, so I can spare the backstory, however I want to note that this is being released 4 years after the infamous 2014 Wisconsin stabbing. Now I will show the official trailer, but keep in mind, seeing how it's a horror movie, there can be NSFW imagery involved, so keep note of that, if you wish to not watch the trailer.
Now, the reason I mentioned Marble Hornets is because of Always Watching: A Marble Hornet Story, which was the first official Slender Man related movie to hit theaters, though it was originally video on demand at first. The film reception was negative for not living up to the original web series. Another Slender Man movie was made called Beware the Slenderman on HBO, however this was a documentary based on the stabbing, mentioned earlier.
Reactions towards this new movie is mixed, so far. However, the father of one of the two people responsible for the stabbings found the movie "distasteful" as according to this Washington Post Article.
My opinion on this movie is mainly mixed, as I see myself a fan of the traditionally Slender Man based mythos, games, and stories, including TribeTwelve. I don't have any interest in watching a movie like this, however some people might still try to watch it.