Hilarious in Hindsight: Johnny Depp tagged along to auditions for the original film with a friend. Wes Craven asked Depp to read as well, and Depp was cast other than the friend he was supporting. But fret not about the friend. 26 years later, Jackie Earle Haley would go on to play Freddy.
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 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 was counting on it.
Two alternate openings that were filmed. The first, which was shown in the trailer and orginal script, was of a party being held where Dean (played by Kellan Luz) 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 Freddy inside an old church for the ending, with scenes even filmed at a local church, but it was cut out entirely or strapped for the another 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.