Marketing
The owners of the franchise have undertaken an extensive marketing campaign of these characters across many media. In addition to the "Haunted Mansion Holiday at Disneyland" featuring "Tim Burton's The Nightmare Before Christmas characters," Jack Skellington, Sally, Pajama Jack, and the mayor have been made into Bendies figures, while Jack and Sally even appear in fine art. Moreover, Sally has been made into an action figure and a Halloween costume. The Mayor has been made into a Bendies figure. Jack is also the titular character in the short story "Tim Burton's The Nightmare Before Christmas: Jack's story."
Oddly enough, Jim Edwards actually contends that "Tim Burton's animated movie The Nightmare Before Christmas is really a movie about the marketing business. The movie's lead character, Jack Skellington, the chief marketing officer (CMO) for a successful company decides that his success is boring and he wants the company to have a different business plan. Some have wondered which real-life company failure the movie is based on: Sergio Zyman's New Coke or Merck's launch and subsequent withdrawal of Vioxx."
Read more about this topic: List Of The Nightmare Before Christmas Characters