The film's writer, Eric Heisserer, also doesn't think too highly of it. When asked what parts of his script he wishes were in the finished film, he replied "Uh, just about all of it." He said that the film was rushed out to meet the 25th anniversary of the original (a Milestone Celebration that it wound up missing anyway), and that his first actual visit to the set, where they were filming a scene that he knew he'd never written, was what convinced him that the film was on the wrong track.
Shown Their Work: The writers bring up quite a few biological tidbits, in order to make Freddy more disturbing:
Micronaps — a sleep-starved brain's attempt to "recharge" with tiny bursts of forced rest — means that staying awake will eventually become meaningless against Freddy.
There is a difference between "Normal" death and brain death. Freddy knows this, and uses the amount of time between the two to do a couple of Serial Killervictory laps on people he has murdered.
Staying awake for too long will cause the brain to forcibly enter a coma. Freddy not only knows this, but he was counting on it.
Two alternate openings that were filmed. The first, which was shown in the trailer and original script, was of a party being held where Dean (played by Kellan Lutz) kills himself by jumping off a high point and crashing into a garden. The second, featured on the DVD and Blu-ray, was Freddy Krueger lying in a hospital bed, covered up to hide his face before dying. He had somehow lived through his ordeal from being lit on fire and was comatose. He only dies several days before the remake even occurs.
According to the casting call sheet, Quentin was originally written as a "indie-style guy who runs the high school's podcast Insomnia Radio".
Nancy and Quentin were also were set to face off against Freddy inside an old church for the ending, with scenes even filmed at a local church, but it was cut out entirely and scrapped for the theatrical ending.
Before settling for a remake, the film was supposed to be a prequel.
Earlier drafts of the script had the dreamworld more fleshed out as an actual location, with one of the characters exploring and even making a map of the place long before Freddy got around to dealing with him.