Trivia: Cheryl Hines plays Kristen Bell's mother in this film. In real life, Hines is only fifteen years older than Bell .
Trivia: "Blood Wars" has been confirmed to be the final "Underworld" to star Kate Beckinsale, and possibly the final film in the series. It was originally intended for there to be one final entry in the series featuring Beckinsale's trademark character Selene to finish off her storyline, but Beckinsale stated in late 2018 that she felt she had done "enough" films in the series and wasn't interested in reprising her role for a sixth film. After the film under-performed at the box office, there has also been no news on any future films, with series co-creator Len Wiseman instead expressing interest in rebooting the franchise as a television series.
Trivia: In the opening scene, one of the soldiers has "Bedtime for Bonzo" written on his helmet. This is a reference to the film with Ronald Reagan about an intelligent chimp.
Trivia: While Lin (played by Jackie Chan) is in disguise and working in his daughter's school cafeteria, his name tag shows Jackie Chan. (00:31:25)
Trivia: When Michael Bryce pushes a man off a bicycle into the river during the scene where Darius Kincaid is escaping by boat, the man yells a Wilhelm scream.
Trivia: The previous two "Transformers" films both earned over $1 billion worldwide at the box office, and this fifth film was considered such a guaranteed hit, nearly a dozen more films set in the "Transformers" universe were planned before its release. However, the movie ended up bringing in the lowest grosses of the entire series, and has as of July 18, 2017, only brought in just over $500 million worldwide- only half of what the previous two films earned.
Trivia: In the final scene, Augustus Gibbons' glasses have one lens darkened - a nod to actor Samuel L. Jackson's role as the one-eyed Nick Fury in the Marvel Cinematic Universe.
Trivia: In the final scenes of the film, Noah Kross, played by Nicolas Cage, is wearing a mechanic's jacket. On the badge on his jacket is the name "Ray." Coincidentally, in his very next film called Looking Glass, Nicolas Cage plays a character named Ray. (01:21:55)
Trivia: Seeing Bruce Willis all-but-naked riding a skateboard through the streets of Venice, California may or may not be amusing. While naked, he also hid a pistol between his buttocks when he had to raise his hands for the police.
Trivia: When Gunther (Arnold Schwarzenegger) is talking about how he became the best, he says "how do you think I learned how to ram my fist into someone's stomach and to break their goddamn spine?" This is from Schwarzenegger's quote in "The Running Man." Gunther goes on to say "he's been doing this for almost 50 years. Schwarzenegger's acting career started in 1970, almost 50 years ago from the time the film was made.
Trivia: This was the final theatrical movie directed by Michael Apted before his death in 2021.
Trivia: Keanu Reeves remained friends with Laurence Fishburne after the original "Matrix" trilogy concluded. One day they meet for dinner and Fishburne talked about how much he loved the first "John Wick." Reeves had a script for the sequel sent to him shortly after. In less than 24 hours, Fishburne responded by saying "I'm in!"
Trivia: At the scene where Jake and Roland are walking through the rusty theme park in Midworld, there is a huge sign saying "PENNYWISE", the name of the demon clown from "It", also by Stephen King.