Although this is the second film in the Fear Street trilogy, it was actually filmed last, after Part One: 1994 and Part Three: 1666.
Like Alice, Tommy is the name for a survivor character from the Friday the 13th (1980) series. This film also copies many locations from this series.
Camp Rutledge stands in for "Camp Nightwing" and was the major filming location used for Little Darlings (1980). Both Fear Street: 1978 and Little Darlings have a scene which was filmed at Camp Daniel Morgan, where Friday the 13th Part VI: Jason Lives (1986) was filmed.
The original trilogy preview shows clips of someone in this movie playing "I Will Survive", on a cassette at the camp. This song, in fact, wasn't released until the 80's and never plays in the movie. The song actually played in the camp was "Carry on My Wayward Son."
The same newspaper article that Josh (Benjamin Flores Jr.) had on his board about Ruby Lane in Fear Street: Part One - 1994 (2021) can be seen in Nurse Lane's diary in this movie.
"Camp Nightwing" is a reference to the setting of the Fear Street book "Lights Out", although the plots are different.
The pills they take from the infirmary with no label on the bottle are stamped "L484," which is the National Drug Code identifier for Acetaminophen 500mg.
Even though they play the same character at different ages, Gillian Jacobs and Sadie Sink never met until the premiere.
C. Berman's dog is named Major Tom, an obvious reference to the song "Space Oddity" by David Bowie. The first time his name is referenced, it's on a label while the Nirvana cover of Bowie's 1970 song "The Man Who Sold the World" is playing.
Composers Marco Beltrami and Brandon Roberts make tributes to some classic horror movies scores, including The Omen (1976) (when they read the nurse's book), and Alien (1979) (in the cavern maze when they find the "nest"), both composed by legendary composer Jerry Goldsmith. There are also some hints to the Friday the 13th (1980) series (when Ziggy is laying in the camp) composed by Harry Manfredini.
When Nick revives Ziggy, "The Man Who Sold the World" by David Bowie plays, foreshadowing the eventual reveal that Nick and his family "sold" Shadyside.
While Tommy is on his killing spree, he murders a group of three Shadyside 'Color War prisoners' inside a cabin. One of the girls (Lana Spraley who is credited as 'Shadyside Prisoner #1') is Asian-American, and may very well have been the aunt of Kate Schmidt (Julia Rehwald), who mentioned in Fear Street: Part One - 1994 (2021) that her "mom's sister" was at Camp Nightwing, which "screwed (her) family up for a long time."
The Velvet Underground's song "Sweet Jane" is heard on the soundtrack. Cowboy Junkies cover can be heard on the Fear Street: 1994 soundtrack.
When Ziggy is roped to a tree by the bullies, one girl calls her a witch like Sarah Fier, the witch believed to have cursed Shadyside. The girl then says Sarah Fier is still alive and wouldn't be if they'd burned her instead of hanging her. In the original Fear Street book series, it was suggested the town was haunted partly because two innocent women were killed for witchcraft hundreds of years ago. Unlike Sarah Fier, they were both burned.
The first name of C. Berman (Gillian Jacobs) isn't initially revealed in order to trick the audience into thinking she's the older version of Cindy Berman (Emily Rudd). However, her dog, named Major Tom, is a clue that she's actually the older version of Cindy's sister, Christine "Ziggy" Berman (Sadie Sink). "Major Tom" is a reference to the David Bowie song "Space Oddity". The nickname "Ziggy" is a reference to Ziggy Stardust, which was Bowie's stage persona from 1972 to 1973.