The opening prologue is set in 2009. Yet, despite Shaggy being portrayed with the latest gadgets, the games console in his bedroom is a Super Nintendo — a system that fell out of mainstream use in the 1990s.
While held in Dastardly's brig in the 2020 film, Daphne notes that Scooby or Shaggy would be the ones to sit in a rigged chair or otherwise reveal a trapdoor. In most of the television series it was actually Daphne who would inadvertently trigger some kind of trap, which is why she earned the epithet 'Danger-prone Daphne' in the original series.
During the opening scenes, Scooby snatches a portion from a spit of gyros meat. A police officer reports it as a "grand theft gyro", pronouncing it "jai-roe" and continuing to use that pronunciation. Gyros is actually pronounced "yee-ros", so the humour fails to land.
The small, feather-like "spikes" on the Blue Falcon's suit often overlap and can be seen clipping into one another whenever he moves.
During the flashback, when the gang are chased by the ghost in the haunted house, the apparition at first seems to be flying by himself as there is no visible string supporting him. However, before they realise he's fake, a string suddenly appears.
