[[WMG: All the Hanna-Barbera shows take place in one universe.]]
On a trip to Europe, [[WesternAnimation/JonnyQuest Dr. Benton Quest]] discovered medieval texts telling of [[WesternAnimation/TheSmurfs small blue creatures]] of human-like intellect. He eventually runs into a live specimen as well as a similar race of [[WesternAnimation/TheSnorks aquatic beings]] described in 17th-century naval reports.

Dr. Quest creates intelligent talking animals by mixing Smurf and Snork DNA with various species. But many of the test subjects, such as WesternAnimation/YogiBear, [[WesternAnimation/TheHuckleberryHoundShow Huckleberry Hound]], WesternAnimation/MagillaGorilla, Franchise/ScoobyDoo and WesternAnimation/TopCat's gang escaped into the wilds or into the cities. As these animals grew more intelligent, some like WesternAnimation/HongKongPhooey, WesternAnimation/QuickDrawMcGraw, [[WesternAnimation/TheAtomAntShow Atom Ant]] and WesternAnimation/SecretSquirrel would help humans in keeping the peace as superheroes or secret-agents. Government genetic engineering efforts to create their own heroic talking animals, robots and superheroes ranging from [[WesternAnimation/DynomuttDogWonder Dynomutt]] to WesternAnimation/TheImpossibles and WesternAnimation/FrankensteinJr met with mediocre success or just making things worse.

When The Valley of the Dinosaurs was discovered in South America, the U.S. government rushed to create more intelligent creatures, though only resulting in rather docile prehistoric experiments. As things on the surface continued to get worse, humanity's elite bailed from the surface, ranging from going [[WesternAnimation/TheJetsons into towering ivory "magic sky castles"]], [[WesternAnimation/{{Jabberjaw}} under]] [[WesternAnimation/{{Sealab 2020}} the sea]] or [[WesternAnimation/TheHerculoids into]] [[WesternAnimation/SpaceGhost space]]. The people and intelligent animals, prehistoric and otherwise, that were left behind reverted to a more prehistoric culture that still resembled the lost ways--a [[WesternAnimation/TheFlintstones modern Stone Age]], if you will--followed by [[WesternAnimation/TheRomanHolidays a slightly less ancient culture]].

As humanity declined, the more human-like talking animals would create their own civilizations resembling those of humanity before the fall including [[WesternAnimation/SwatKats Megakat City]] and an undersea city with the law being kept by WesternAnimation/FishPolice.

''WesternAnimation/LaffALympics'', ''[[WesternAnimation/YogiBear Yogi's Gang]]'' and ''WesternAnimation/WackyRaces'' confirm this for early Hanna-Barbera.
* How do the later Cartoon Cartoons fit into this?
[[WMG: All the Hanna-Barbera shows take place in one universe w/ better research and logic]]

Hanna Barbera shows did not have a set rule, but has the standard logic that we can see stand true back at MGM, through their own and into some modern attempts at them.

All HB shows exist in one universe, but it is a faulty timestream. The amount of characters who time travel or warp reality are numerous (The Great Gazoo, Shazzan, Jeannie and Babu, The Pastmaster, The Smurfs in the last season, Cupcake, plus one-time baddies like Dr Millennium, Time Slime, Timeatron, etc.) that if one takes the assumption they all co-exist in order to crossover, then all that damage to the timeline has created many cracks and issues, that resulted in times where canon meant something and times where it was irrelevant, because the timeline was changed without anyone realizing.

This, at its' bare minimum, creates reasonable excuses for every continuity problem there ever was or ever will be. This creates the plausible world and why these cartoons sometimes have zero regard for continuity, but sometimes pull it out for pure brilliance (the Herculoids using a ship they captured earlier in the series, the Smurfs being one short of 100 which later revealed because they lost Wild Smurf, ''A Pup Named Scooby-Doo'' bringing back Shaggy and Scooby's sisters, Snagglepuss's earlier antics being blamed on his brother Snaggletooth that shows up in a ''Snagglepuss'' short, etc)

[[WMG: Cartoon Network bubble?]]

In addition to the above, perhaps the real life Turner buyout was a crisis crossover to the Hanna-Barbera world? They exiled Cartoon Network's characters out of their world, but the result ripped shells of their former selves into the Cartoon Network and Adult Swim shows. Also explaining why those shows often feature cameos of older cartoons yet the modern continuations of the Hanna-Barbera shows do not return the favor with Cartoon Network references.

[[WMG: Hanna Barbera's internet reputation will be altered soon]]

Hanna Barbera had it's name and reputation drug through the mud by the internet and somewhat by Cartoon Network/Adult Swim since at least the early 2000s. Despite being the reason many people who were 90s kids, even know about some of the list on the main page, they have been ragged on up and down the road. In some cases on opinions and others with huge helpings of CowboyBebopAtHisComputer and lack of actually looking into the company's catalog.

However despite this the last several years have made it well clear, there is a SilentMajority to be found. Each year it is Hanna Barbera's dvds that dominate the back catalog. There is multiple good reaction on social media to new releases. Warner Archive routinely gets panels to talk about them, and more exhibitions are being held for Hanna Barbera and newer made Scooby Doo and Tom and Jerry features. In which they are continually going deeper into the well for inspiration. And now to top it all off WB wants to make a whole cinematic universe out of the HB library.

Hanna Barbera as a brand, never lost it's popularity or crowd, it merely lost it's presentation. In an era of the internet where complaining takes more importance than discovery, HB's brands found themselves trashed by the vocal minority but still cherished by the silent majority. Many kids grew up with this being the reality of what they knew about Hanna Barbera, and now are very confused about why all the second paragraph is happening.

In the future this will change. Warner Brothers has the chance to make a hit and make a statement that these characters were never out to pasture, and are ready to show off what they can do. The future tvtroper looking back at this page will read this WMG and say "There was a time a lot of the internet said these shows sucked?" in confusion. Because they will have grew up in the era WB was proud to milk Hanna Barbera characters. Those kids will already be internet savvy and will be more likely to make the silent majority become less silent on many internet forums.

[[WMG: Success of the Animated Scooby Movie will present a Hanna Barbera Cinematic Series]]

Given they do have plans for more than one film (four animated ones at least), they will name drop or cameo other characters in the Scooby one. This they probably will hope for other lesser remembered characters to possibly be used in future films or at the very least provide easter eggs for long time fans in the movie.
* This has practically been confirmed as the plan by Tony Cervone. But the description of the first movie seems to be starting off as a blatant crossover. So it appears more than just name drops and cameos.