Trivia: During the feast in which Christian finds a pubic hair inside of his food, look closely at the drinks on the table. While the camera never calls direct attention to this, if you look closely, Christian's drink is very slightly darker than everyone else's. Earlier in the film, the camera briefly passes over a mural that depicts a woman collecting menstrual blood in a cup. (Along with the image of a woman cutting off pubic hairs, like the one Christian found in his food.) It seems Christian's drink has been laced with something he didn't expect.
Trivia: "Child's Play" creator Don Mancini has no involvement in this remake, and has openly stated that he's against it, as the original movie series is still going. Several other key cast and crew members from the original series have also expressed their disapproval of the film.
Trivia: When we see Abra's house, the number on the front is 1980. That was the same year the original Shining was released.
Trivia: When Tallahassee and Columbus are navigating the abandoned mall, they pass a poster for "Garfield 3."
Trivia: The movie was filmed in a full-frame aspect ratio and in black and white in order to help put the audience into the film. The aspect ratio was chosen in to make the film feel more confined and closed in. And it, along with the black and white filmstock, also helps the film feel aged and older.
Trivia: Nina's visiting Uncle is killed in his car by Karl's mute servant Hagen, who causes a car accident and then proceeds to set him on fire. Hanging on the rear view mirror is a Happy Face that gets a splotch of blood on it, reminiscent of The Comedian's iconic pin in The Watchmen.
Trivia: Series star Warwick Davis reportedly turned down the opportunity to star in the film. He stated that as he now has children, he wanted to focus on non-horror projects for the time being. Though he also hinted that he would like to return to the genre once his kids get older.
Trivia: In the 2019 Adams Family Wednesday is older than Pugsley, but in the original, Pugsley is the oldest.
Trivia: Each film in this franchise features an actor who died either shortly after filming, or the film's release date. Dennis Fimple, who played Grandpa Hugo, died shortly after production wrapped on "House of 1000 Corpses." Matthew McGrory, who played Tiny, died 5 weeks after "The Devil's Rejects" was released. Finally, Sid Haig, who played Captain Spaulding, died 5 days after "3 From Hell" was released.
Trivia: The costume designer threw in Easter-Eggs that most people never notice. When Tree wakes up in the other dimension, she's wearing the same clothes from the first movie, including a concert-tee. However, if you compare the shirts from the two movies, while the picture is the same, the words are slightly different. (Ex. A different venue is listed on the shirt.) This is to provide a subtle hint Tree is in another dimension. There are similar tiny changes in the other character's clothing, too.
Trivia: The cuckoo bird was used at the beginning of the movie to point out what a parasitic bird does - secretly lays eggs in the nest of another bird species and leaves them for the different species to raise as their own. Another "brood parasite" that many people might be more familiar with is the Brown-headed cowbird. If all goes as intended, the different species, such as a Cardinal, will take care of the eggs until they hatch and continue feeding fledgings. Sometimes, "alien" eggs are evicted.
Trivia: After the police arrived, Hayley told Sarah, "It is not my fault my parents put a LoJack in my car." LoJack is a high-tech GPS system and theft recovery device that can pinpoint a car's exact location. LoJack ended sales in the U.S. in 2021 (will not accept any new orders but will continue to service existing connected vehicles). (00:41:50)
Trivia: Spoilers: Among the video-tapes seen next to the TV after the opening credits are "C.H.U.D." and "The Goonies." This is quite relevant to the plot, in which it is revealed that the doppelgangers come from beneath the ground in a series of tunnels that used to be run by the government. "C.H.U.D." is about mutant creatures that live underground and have began to rise up and attack, like the doppelgangers, and "Goonies" takes place largely in underground tunnels and caverns, much like the film's climax.
Trivia: The Mermaid spit "ink" at Dr. Beyer in his car. This suggests a Mermaid is similar to an octopus, squid, or cuttlefish (which have "ink sacs" - though anal, not oral!) and is a type of mollusk, not fish. However, mollusks are invertebrates, and the Mermaid in the movie apparently had a spine/backbone. (01:13:28)