At the weekly meeting of the Justice League, Cyborg tells everyone the meeting will be next week "Same Bat time...same bat channel" which is the same thing spoken after episodes of the 1960's "Batman" TV series.
Husband & wife duo Jerry O'Connell and Rebecca Romijn provide the voices for Superman/Clark Kent & Lois Lane.
The Star Labs building bears a strong resemblance to the Star Labs building in the CW TV show "The Flash (2014)."
In "Superman (1978)" after Superman catches Lois falling from a helicopter he says "I've got you." Lois replies, "You've got me? Who's got you?" In this version the same lines are spoken but the roles are swapped.
When Lex Luthor sneaks away from his penthouse and into his secret laboratory, he's briefly seen wearing a fake wig and beard of red hair to disguise himself. This is a nod to the 1992 comic book series, where Lex's (then) design had him sporting long, red hair and a beard. At the time, the belief was that Lex Luthor was actually a clone of the original bald Lex Luthor, who had died of cancer because of his exposure to radiation poisoning from being around Kryptonite so often (most notably his custom made ring). However, a couple years after Superman's death it was revealed that the original Lex had transplanted his brain into the clone body and was indeed the original Lex all along.
"The Death of Superman" and its follow-up/sequel "Reign of the Superman" both receive a nationwide theatrical release in the U.S. as a double feature on January 13 and 14, 2019 through Fathom Events.
Martha and Jonathan Kent bear a strong resemblance to Martha and Jonathan from the live action TV show "Lois & Clark: The New Adventures of Superman" played by actors K Callan and Eddie Jones.
Multiple signs indicate a location in/near Metropolis called Carlin Heights. This is a reference to DC Comics writer and editor Mike Carlin, who was the Group editor of the Superman comic books at the time the "Death of Superman" story line was first published.
J'onn J'onnz is the only other Justice Leaguer, besides Superman himself, who fought Doomsday in both this movie and the original "Death of Superman" comic. In the comic J'onn was under the assumed identity of the superhero Bloodwynd and didn't fight Doomsday as himself like in the film. In both he was taken out of the fight by being hurled into fire, though in the comic it was a burning building and not an exploding gas station like the film.
This is the third film adapted from The Death of Superman comic. The first two were Superman/Doomsday (2007) and Batman v Superman: Dawn of Justice (2016).
Toks Olagundoye (Cat Grant) previously appeared with Nathan Fillion (Green Lantern) in the final season of Castle (2009); Stana Katic, Fillion's leading lady, and Molly C. Quinn, who played Castle's daughter, played Lois Lane and Supergirl, respectively, in Superman: Unbound (2013).