In the original poem written by Tim Burton, the only characters that existed were Jack, Zero and Santa. All the other characters were made up for the movies, although he describes some of the presents which were given out, including in some cases the names of the children.
In 2001, Walt Disney Pictures began to consider producing a sequel, but rather than using stop motion, Disney wanted to use computer animation. Tim Burton convinced Disney to drop the idea. "I was always very protective of [Nightmare] not to do sequels or things of that kind," Burton explained. "You know, 'Jack visits Thanksgiving world' or other kinds of things just because I felt the movie had a purity to it and the people that like it," Burton said.
Tim Burton has said the original poem was inspired after seeing Halloween merchandise display in a store being taken down and replaced by a Christmas display. The juxtaposition of ghouls and goblins with Santa and his reindeer sparked his imagination.
There is something of a controversy over exactly who has the rights to call the story and film their own, Henry Selick is the director and spent more time on the set and production than Tim Burton, however Burton has often claimed he is the owner of the story as it was all his idea, he wrote the original poem and most of the script, created the characters, served as a producer, and even wanted to direct but was simply too busy at the time to do so. However popular culture has long accepted the film as Burton's as the film heading is Tim Burton's the nightmare before Christmas.
According to Henry Selick, Vincent Price was originally cast as Santa Claus. However, after the death of Price's wife, his own health began to fail and his voice performance was very frail and weak. The tracks were deemed unusable which led to, much to Selick's regret, the role being recast.
It is stated in "The Making of..." book that the most difficult shot to film in the entire movie is the shot in which Jack is reaching for the doorknob to Christmasland. Viewers can see the perfect surround reflection of the forest around Jack in the background.
Tim Burton had hoped to direct, but placed Henry Selick in the director's chair instead as Burton was busy working on Batman Returns (1992) and had Ed Wood (1994) in pre-production. Selick estimates that Burton was present 8 to 10 days total during production.
The teaser trailer tells us that the film was originally intended to by released under the Walt Disney Pictures banner, playing the movie heavily as the next generation of filmmaking following in the proud tradition of Walt Disney. By the time the theatrical trailer was released, the release label had changed to Touchstone Pictures, an alternate designation of the Walt Disney Studios. Michael Eisner, the then CEO and Chairman of The Walt Disney Company, found the film to be 'too dark for kids' and had it moved to their Touchstone Picture banner. In October 2006, the film was re-released in 3-D under the Walt Disney Pictures banner.
Two items were invented to facilitate the filming of the movie: One was a "light alarm" which would warn the animators if any of the stage lights failed to come on. The other was a system that enabled a puppeteer to seamlessly switch to a replacement puppet if a puppet broke during a shot. Prior to this, either situation, a light failing to come on or a puppet breaking would destroy a shot.
There are only two shots in the entire film that were filmed at normal speed (24fps), one is the opening overhead shot of the trees in the forest and the other is the bugs falling into the molten pit in Oogie Boogie's lair.
A crossed-out calculation on Jack's blackboard seems to equate 3 times the square of pi multiplied by 12 to Christmas Day (a Santa hat). The true numerical answer is approximately 355.31. If the decimal portion is dropped, this then equates to December 21st, the 355th day of the year--hence the crossed-out equation. December 21st however is the first day of winter in the northern hemisphere (winter solstice). It is also the birthday of Jeffrey Katzenberg, the film's executive producer and most often credited for turning Walt Disney Studios and its animation division around after joining in 1984.
Since 2001, a seasonal overlay of the Disneyland Park California and Tokyo Disneyland Haunted Mansion attractions called Haunted Mansion Holiday combines the characters and setting/theme of the ride with the characters and storyline of this film.
In the first home Jack visits, there appear to be two commemorative Elvis Presley plates on the living-room wall. This is likely a reference to Presley's 1964 song "Blue Christmas" (and its apropos line "I'll have a blue Christmas without you").
The half-obscured gatekeeper in bowler hat seen in the musical opening appears to have the head of an ibis. This might be a reference to the ibis-headed Egyptian god Thoth. Though Thoth was anything but a gatekeeper, he was considered a deification of the moon, and controlled his own domain in the underworld.
Jon Davis, lead singer of the metal band Korn did a cover song in his own metal stylings of "Kidnap the Sandy Claws". He did it live via webcam at his own home studio so that the fans could watch it as he produced it. The version is wonderfully heavy and really fits the the theme overall.
Jack rides across the sky under a Christmas Eve full moon. Between the end of World War II and the end of 1993 (year of the film's release) there were only five Christmas Eves with a full moon, or as close to full as no matter: 1950, 1958, 1969, 1977 and 1988.
It took them 3 years to finish the movie because the characters were like play doh and they had to move the characters one move then take a picture and they took a picture every move till the end of the movie
The trivia item below may give away important plot points.
Some of the presents Jack delivers to the kids are nods to his other films. The snake looks like a Sandworm from 'Beetlejuice',and the shrunken head is from the Deads waiting room in the same film.The Cat and Duck are both featured in 'Batman Returns' - the Cat as the mascot for Shreck's department store which Catwoman blows up, the duck being similar to the vehicle the Penguin crashes the High Society party with.