History HilariousInHindsight / ScoobyDoo

* Velma is featured as the brainiest and most intellectual character of the franchise. Sheila Kuehl, the former actress whose [[Series/TheManyLovesOfDobieGillis sitcom character]] was the inspiration for Velma, went on to successful careers first as an attorney, then a law professor, then a State Assemblywoman, then a State Senator, and then a County Supervisor. Fictional Velma and real-life Kuehl are both positive images of brilliance and being LBGT.

* In the ''Where Are You!'' episode "Foul Play at Funland", Scooby remarks about Charlie the robot being like Franchise/{{Superman}}. The next series, ''The New Scooby-Doo Movies'', included [[Franchise/{{Batman}} Batman and Robin]] as guest stars. Eventually, Creator/WarnerBros became the owners of both Franchise/DCComics and Scooby-Doo. Mystery Inc would team with Superman in [[ComicBook/ScoobyDooTeamUp comic books]], and more than five decades since that episode first aired, Superman would be featured with Mystery Inc in animation [[WesternAnimation/ScoobyDooAndKryptoToo for the first time]].

* The episode where they're trying to stop the MonsterClown. Said clown hypnotizes Shaggy into being a lion tamer. Shaggy is found in there yelling [[WesternAnimation/TheLionKing1994 "Back up there, Simba!"]]
** Although that may be because Simba is the Swahili word for "lion".

* In the ''Where Are You!'' episode "Foul Play at Funland", Scooby remarks about Charlie the robot being like Franchise/{{Superman}}. The next series, ''The New Scooby-Doo Movies'', included [[Franchise/{{Batman}} Batman and Robin]] as guest stars. Eventually, Creator/WarnerBros became the owners of both Franchise/DCComics and Scooby-Doo. And Mystery Inc would team with Superman in [[ComicBook/ScoobyDooTeamUp comic books]].

* In the ''Where Are You!'' episode "Foul Play at Funland", Scooby remarks about Charlie the robot being like Franchise/{{Superman}}. The next series, ''The Scooby-Doo Movies'', included [[Franchise/{{Batman}} Batman and Robin]] as guest stars. Eventually, Creator/WarnerBros became the owners of both Franchise/DCComics and Scooby-Doo. And Mystery Inc would team with Superman in [[ComicBook/ScoobyDooTeamUp comic books]].

* All those theories about Velma being a lesbian can be this in light of the fact that [[Music/HayleyKiyoko the actress who plays her]] in the live action Scooby-Doo prequels is a real life lesbian.

* The film has shared many similarities to ''Film/GuardiansOfTheGalaxy'' and not just the fact they were both written by Creator/JamesGunn.

** Fred and Starlord are the slick leaders that have a dance-off by the climax.

* In the mid-90s, Creator/CartoonNetwork played a commercial parodying the beginning of ''{{Film/Scream}}'', featuring Daphne being called by a spooky voice that turns out to be Shaggy, asking for some popcorn. After Creator/CaseyKasem retired from voice acting, Creator/MatthewLillard (who was in the first ''{{Film/Scream}}'' movie) took over as Shaggy's voice actor.

* At the end of ''Scooby Doo! Pirates Ahoy'', Fred's dad mentions they should give them a trip to the Himalayas for Fred's birthday next year, which Shaggy quickly passes on because he doesn't want to risk a run in with the Abominable Snowman. The next year's movie, ''Chill Out, Scooby Doo!'' saw this happen as the main plot.
* ''The New Scooby-Doo Mysteries'' HalloweenEpisode "A Halloween Hassle at Dracula's Castle" saw Shaggy attend a costume party as a werewolf. ''Scooby-Doo and the Reluctant Werewolf'' aired four years later.

* In night of the living toys, a 1984 ''New Scooby-Doo Mysteries'' episode. [[spoiler: A woman finds Scrappy cute and tries to put ribbons on him, and which he dislikes immensely. Later when she turns out to be the woman behind the mask, he states that he didn't trust her as soon as she tried to put ribbons on him. Live-Action Scrappy is the one who thinks of himself as cute, and ''he is the villain of this movie.'']]
* Most of the Spooky Island demons are voiced by Creator/JessHarnell and sound just like ''VideoGame/CrashBandicoot''. Jess Harnell would voice the gaming icon since 2005.

* In night of the living toys, a 1984 ''New Scooby-Doo Mysteries'' episode. [[spoiler: A woman finds Scrappy cute and tries to put ribbons on him, and which he dislikes immensely. Later when she turns out to be the woman behind the mask, he states that he didn't trust her as soon as she tried to put ribbons on him. Live-Action Scrappy is the one who thinks of himself as cute, and ''he is the villain of this movie.'']]

* In night of the living toys, a 1984 ''New Scooby-Doo Mysteries'' episode. [[spoiler: A woman finds Scrappy cute and tries to put ribbons on him, and which he dislikes immensely. Later when she turns out to be the woman behind the mask, he states that he didn't trust her as soon as she tried to put ribbons on him. Scrappy is the one who thinks of himself as cute, and ''he is the villain of this movie.'']]

* The episode where they're trying to stop the MonsterClown. Said clown hypnotizes Shaggy into being a lion tamer. Shaggy is found in there yelling [[Disney/TheLionKing "Back up there, Simba!"]]

* Most of the Spooky Island demons are voiced by Creator/JessHarnell and sound just like Crash Bandicoot. Jess Harnell would voice the gaming icon since 2005.

* After [[spoiler:Scrappy]] was revealed to be the villain, many ''Franchise/StarWars'' fans suspected that Jar Jar Binks is the main antagonist of the sequel trilogy. Turns out they were wrong. Funnier enough, Creator/FreddiePrinzeJr and Creator/SarahMichelleGellar voiced Kannan Jarrus and the Seventh Sister from ''WesternAnimation/StarWarsRebels'' with Prinze returning for a voice cameo in ''Film/TheRiseOfSkywalker''.

* After [[spoiler:Scrappy]] was revealed to be the villain, many ''Franchise/StarWars'' fans suspected that Jar Jar Binks is the main antagonist of the sequel trilogy. Turns out they were wrong.