Film School Rejects has an interesting article about Room 237. Scott Beggs calls the trailer "nothing short of amazing." However, he points out that the teaser really contains no scenes from the movie itself. It seems this is because the movie is "comprised solely of shots from The Shining..."
Room 237 will arrives in theaters March 29th, with Beggs hoping that
"by then they’ll have turned it into an actual movie. The cut that played at several festivals last year was the film version of a research paper where a kid slapped all his source material loosely into a three-ring binder and turned it in without trying to organize anything. It’s an engaging idea, but it hasn’t really been turned into a movie yet — just a string of headache-inducing images and cluttered voice over. So even though this is monumentally geek-tastic, it’s not really surprising that copying the original is all they had up their sleeves."