Inspiration for the Work: Stephen King first got the idea in 1998 at a book signing when somebody asked him what happened to Danny. This was a question King had often asked himself as well as what would have happened to Jack Torrance had he found AA. King started thinking about how old Danny was and where Wendy was now, and decided to find the answers with a sequel, but it was a tall order.
Sequel Gap: Released in 2013, 36 years after its 1977 predecessor. The book self-references this, making oblique references to every American president from Jimmy Carter to Barack Obama, and incorporating technological advances (cell phones, GPS, iPads, and so on).
Throw It In!: According to King, he never originally intended for Abra's name to stem from "abracadabra," and it was just a "happy accident."
Write What You Know: In the time since writing The Shining, King had struggled considerably with alcoholism and substance abuse, which explains his notably harsher stance on the topic than in the original book.
Acclaimed Flop: The film earned solid reviews across the board from critics and audiences (with a 77% on Rotten Tomatoes to boot), with quite a few saying that it captured the essence of King's work better than most. However, box office figures were unfortunately not reflective of the praise. See Box Office Bomb for those details.
Abra's love of RWBY in the movie, from the memorabilia in her room to her taking on a hairstyle similar to recurring villain Emerald Sustrai in her mental projection, is thanks to her actress Kyleigh Curran, who is a big fan of the series in real life.
Similarly, Rebecca Ferguson came up with the idea for the various trinkets that Rose the Hat would wear, envisioning them as "hunting trophies that she would love to wear Hidden in Plain Sight."
Approval of God: Writer/Director Mike Flanagan worked closely with Stephen King as well as the Kubrick estate to ensure the movie was a pleasing adaptation of the book and a satisfactory sequel to the film. By most accounts, all parties involved are happy.
Awesome, Dear Boy: Rebecca Ferguson is not a fan of the horror genre, but is such a massive fan of Stephen King's work that she instantly signed on to star in the film as soon as it was announced.
Box Office Bomb: Budget, $47 million. Gross, $31,581,712 (domestic), $72,281,712 (worldwide). The cause is believed to be the film being released after Halloween, the unfamiliarity of younger moviegoers with the source material (the older Stephen King novels and The Shining film, which came out in 1980), and the film's mediocre marketing campaign that seemed to have aimed more at imagery from the preceding film rather than the film's own imagery.
Dyeing for Your Art: Henry Thomas had to shave his head and wear a wig to convincingly match the hairline of Jack Torrance from The Shining.
Fake Nationality: Swedish Rebecca Ferguson plays Rose the Hat, who sports an Irish accent and is implied to be Romani by birth.
The Other Darrin: All of the returning characters from the original film have been recast; necessarily so since Scatman Crothers (Dick Halloran) passed away in 1986 and all three original Torrances (Danny Lloyd, Jack Nicholson, and Shelley Duvall) have all retired from acting. All flashbacks to the events from the original have been re-shot with new actors, albeit in such a way to match the original as closely as possible. Similarly, the returning ghosts from the Overlook are played by new actors for similar reasons.
Reports indicate that Warner Bros. were looking into further expanding the Shining mythos with a Dick Halloran prequel film, a prospect that has been dropped with Doctor Sleep's mediocre box office results.