Trivia: In the film, the two transfer students are Kiriyama, the silent killer, and Kawada, the winner of a previous Battle Royale. In the original novel, only Kawada was the transfer student; Kiriyama was in the same class selected for this game of death. He was the main antagonist.
Trivia: Spoilers! Red Skull makes his long-awaited return to the MCU after his appearance in Captain America: The First Avenger. We discover that he's been guarding the soul stone as punishment, of sorts. However he's played by Ross Marquand, not Hugo Weaving.
Trivia: The Mask is based off the Dark Horse Comic of the same name. The only difference is that Dark Horse Comics carry a lot of dark tones in their comics. When Chuck Russell was directing The Mask, it was supposed to be set in that way. When Jim Carrey was given the role of Stanley Ipkiss, it was turned into a comedy.
Trivia: In the comics, Falcon has taken on the mantle of Captain America before.
Trivia: When Gordon is promoted to Commissioner, Heath Ledger improvised the Joker joining in with the applause.
Trivia: The picture on the computer of the hive looks like an upside down umbrella and the name of the corporation who own the hive is ... the Umbrella corporation.
Trivia: Harold Sakata (Oddjob) was formerly a professional weightlifter and won a silver medal for the United States at the 1948 Olympics in London.
Trivia: The tune that Elle Driver is whistling in the hospital is the theme from the movie 'Twisted Nerve' (1968)
Trivia: Director Jason Reitman is the son of Ivan Reitman, director of the original "Ghostbusters" and "Ghostbusters II." As a child, Jason actually had a cameo in "Ghostbusters II" during the birthday party in the beginning. (He's the kid who tells Ray he heard the Ghostbusters were "full of crap").
Trivia: Linda Harrison, who portrayed Nova in the original Planet of the Apes and its sequel Beneath the Planet of the Apes, has a cameo appearance in this movie as one of the people inside the rolling cage as it's being taken into the city. She is seen standing next to Mark Wahlberg, shaking her head when he asks her a question.
Trivia: Hitler was played by the actor Michael Sheard, this was the third time he had played Hitler for film and TV. Ironically, Sheard's wife was half-Jewish.
Trivia: The line "Hold on to your butts" said by Samuel L. Jackson is also said by him in Jurassic Park.
Trivia: Music composer John Williams has a cameo as a bartender on the planet Kijimi.
Trivia: Michael Biehn gets bitten by Sarah Connor in Terminator, by the child in Aliens, and again in the Abyss. All three films were written and directed by James Cameron.
Trivia: "Bone-Saw" McGraw is played by real-life wrestler "Macho Man" Randy Savage. He started his wrestling career as a masked wrestler named "The Spider". (00:35:20)
Trivia: The real Marcus Luttrell appears several times throughout the movie: he spills the coffee and tells the new guy to clean it up; he's in the operation briefing and shakes his head at the rules of engagement being read; and he's on board the Chinook helicopter when it is shot down.