The filmmakers of the new movie "The Slender Man" have released 3 early test teasers to get input from the fans. They actually want to include the fans on the making of the film and listen to them.
Check em out:
Teaser 1 -
http://www.youtube.com/watch?v=_Fb2Lt4Ubno
Teaser 2 -
http://www.youtube.com/watch?v=-OQxxO9YuKg
Teaser 3 -
http://www.youtube.com/watch?v=PvRzXYaU5D0