• Scary/Threatening: 14/50, or 28%
• Leaders: 3/50, or 6%
• Just a T-Rex: 23/50, or 46%
• ZCE: 6/50, or 12%
• Other: 4/50, or 8%

Note that the ZCE pile only had 6 examples because it became a dumping ground for the wicks that didn't even specify the dinosaur's species. The "Just a T-Rex" pile includes multiple examples that are just potholes and references to these dinosaurs, which would've normally been classed as a ZCE under different circumstances. However, the very fact that people are using this trope as a pothole for any T-Rex mention proves that people do indeed just see it as the second coming of Tyrannosaurus Rex.

And it's sad, because I do think "Stock threatening T-Rex" is a valid trope, similar to Bears Are Bad News and Threatening Shark. But the name is still too vague, and that might be what's tripping people up. Threatening T Rex is blander, but might get the point across better. This name is also tripping people up into thinking the trope is literally about T-Rexes being leaders or authority figures, and while that might be a valid natural leap from the "big scary dinosaur" angle, it is not what the trope currently focuses on and the actual examples of T-Rex authority figures are minimal. I think we can keep the "T-Rex are big, intimidating and powerful" angle and let the "authority" examples remain as an extension, even if the title changes... but the title does have to change.

1. Anime.Zoids Wild: Gigaboss's Zoid Demise, known as Death Rex in the Japanese version, is a massively powerful and nearly indestructible Tyrannosaurus-type Zoid with the power to either save or conquer the world. It is treated as the strongest Zoid to ever exist and dominates wild Zoids.
2. DarthWiki.Secrets Of The Xenoscope: After being absent from the first two books, Tyrannosaurus makes its appearance in the third book, and is quickly established to be one of the biggest threats the protagonists face.
3. Fanfic.Holding The World On Their Shoulders: The grimm guarding the silent archive is modeled after a t-rex, and is by far the most dangerous grimm May fights in the entire fic, being fearsome enough that just the ancestral memory of it causes Cassia to freeze up
4. GeniusBruiser.Real Life: As it turns out, Tyrannosaurus rex might've been the ultimate example of this trope. Not only was it the most massive land predator to ever live, with a bone-crushing bite and an extremely beefy build, recent studies have shown that it was a neurologically complex animal with extremely powerful senses, including vision better than a hawk's and scent better than a bloodhound's. As if that wasn't enough, a recent study has indicated that it may have been as intelligent as a modern day baboon, making it one of the smartest animals of its time.
5. Monster.Literature H To M: "Just Like Old Times", by Robert J. Sawyer (link): Dr. Rudolph Cohen was a former surgeon and Serial Killer, convicted and sentenced to death for the torture and murder of 36 people; Cohen would admit to these murders without remorse, and at one point thinks about the sexual joy he got from them. Sentenced to be executed by "chronotransference"—having consciousness transferred to a historical person at the time of their death—Cohen requests to link his mind to a Tyrannosaurus rex, due to the Judge comparing him to one for how cold blooded he was. Once linked to the T. rex, Cohen gets the unusual ability to influence its body, having it kill a triceratops to live out a boyish fantasy of dinosaurs fighting. After terrifying and slowly killing a Purgatoris, an ancient ancestor to primates, he quickly gets the idea to hunt enough of them down and erase humanity from the evolutionary chain, musing that he's hunting humanity itself. Pothole italicized already
6. NightmareFuel.Video Games: 3D Monster Maze. The first 3-D game ever made, involves you trying to navigate a maze while avoiding a T. rex. For a game with retro graphics, it's terrifying and has been described as the "1982 Slender" and "the original Survival Horror game" (predating Resident Evil by 13 years and Alone in the Dark (1992) by 10 years!).
   REX HAS SEEN YOU
   RUN HE IS BEHIND YOU
7. Pinball.Jurassic Park Stern:
   • The various T. rex-centric modes generally show it in a fearsome light. The first mode on default settings, "Feed T-Rex", depicts it eating a goat via Second-Person Attack, then later modes escalate to things like chasing after the player's Jeep in "T-Rex Chase" and terrorizing the employees in "T-Rex Encounter".
   • The T-Rex Paddock is one of the most difficult paddocks to complete in the game thanks to how aggressive it is, so successfully capturing it will instantly award an extra ball and extend all the game timers by 8 seconds for the rest of the game.
8. Series.Planet Dinosaur: Subverted. T. rex itself is frequently mentioned but never actually shows up. It is, however, used as essentially a measuring stick for how tough all the other animals are, showing that its legendary reputation still precedes it.
9. VideoGame.Fossil Fighters: T-Rex, the Fire-type Vivosaur version of Tyrannosaurus rex, is the Series Mascot present in all three games, and is treated as one of the strongest and most popular, with skill names like "Tyrant's Roar" and "Law of the Jungle". In the original game and Champions it is something of an Infinity +1 Sword, having tremendous attack but detrimental support effects and usually only being able to be revived late in the game, though the small theropod Guan can transform into it during battle. Champions lets it Super Evolve into T-Rex Lord, and adds the skeletonized B-Rex and the zombified Z-Rex. Frontier splits T-Rex into the early-game T-Rex Sue (which resembles the original) and the late-game T-Rex Stan (which is blue with purple fur and Air-element), and you can even fight the real Tyrannosaurus rex at one point and use it yourself via an AR card.
10. VideoGame.Putt Putt: Averted in Travels Through Time where Putt-Putt meets a Tyrannosaurus who is a big scaredy-dino, but nonetheless friendly and helpful. An aversion, but it does avert the correct trope
11. VideoGame.Zoo Tycoon: Tyrannosaurus rex is an adoptable dinosaur in both games. This is one of the most expensive and hardest animals to keep happy and enclosed, but it's also one of the most popular with the guests. Set it loose in a zoo and it'll tear through everything with nothing able to kill it, but the sequel also makes it potential prey for the Killer Penguin and, for some reason, the giant ground sloth.
12. Webcomic.Dawn Of Time: In Chapter 3, Dawn, Mantell, and Blue get chased by a Tyrannosaurus that tries to eat them.
13. Website.Spec World: Zig-Zagged. Spec does have tyrannosaurs, which are implied to be descended from T. rex itself, but most of them are small creatures that fill niches akin to hyenas. However, the project couldn't shy away from having some awesome giant tyrannosaurs too, especially the sabre-tyrants, massive arctic predators with huge fangs like sabre-toothed cats. This is exaggerated with the imperial sabre-tyrant, whose name declares it to be even greater than a king.
14. WesternAnimation.Archies Weird Mysteries: In "Teen Out of Time", Vinnie Wells brings a Tyrannosaurus to modern times so that it would eat Archie and wreck havoc in Riverdale.

1. Anime.Daigunder: Bonerex is a red T. rex and the team leader of the Dino Unit.
2. Characters.Extreme Dinosaurs: T-Bone is a t. rex, the leader of the Extreme Dinosaurs and a sympathetic hero who battles against the evil Raptors. He even proclaims himself to be this in "T-Foot" when he breaks free of the Raptor's attempts at mind controlling him!
3. ComicBook.Flesh: Old One-Eye is regularly shown to be the undisputed ruler of her prehistoric domain, and even the other tyrannosaurs are afraid of her.

1. Bad Vibrations: The film version of Jurassic Park has a much-parodied scene where ripples in a glass of water foretold the arrival of the Tyrannosaurus rex. It later recurs when Malcolm notices rippling in a puddle formed by the tyrannosaur's footsteps. Notably does not happen at the end; to be fair, the main characters were probably a bit distracted by the Velociraptors trying to eat them to notice that the ground is shaking a little. Pothole italicized
2. Characters.Calvin And Hobbes Calvin: Calvin fantasizes about being a Tyrannosaurus rex so much that it's practically an alter ego in and of itself.
3. Characters.Toy Story Other Toys: Based on the intro of the Show Within a Show Battlesaurs, he was a regular T. rex before he became an Uplifted Animal.
4. EnemyMine.Live Action Films: Jurassic World; Blue teams up with Mama Rex to battle the Indominus Rex (Given the the last time these two species met they tried to kill each other, this is a marked improvement)
5. Film.Clifford: The main attraction of Dinosaur World is a huge, animatronic Tyrannosaurus aptly named "Larry, the scary Rex".
6. Film.Land Of The Lost: Grumpy, the Animal Nemesis of Marshall, is a T. rex.
7. Film.Super Mario Bros 1993: Koopa is descended from the T. rex and turns into one in the end. Yoshi also somewhat resembles a miniature Tyrannosaurus.
8. Funny.Nico B: During the Halloween Bayonetta 3 stream, out of tradition, he decides to dress up for the stream which was speculated to be related for the game he was playing, only for him to come out as a T-Rex wielding a chainsaw with Doom (2016) music in the background.
9. Literature.Dead Beat: Oh, and a T. rex is involved. Pothole italicized
10. Literature.Rex Series: The series is typically about a little girl named Cordelia doing various fun activities with some prehistoric friends, in particular a T. Rex.
11. MythologyGag.Duck Tales 2017: In Launchpad's flashback, one of the kids is dressed as the Tyrannosaurus rex from Bubba's debut episode in the original series. Another kid is dressed almost identically to how Mickey appeared in The Sorcerer's Apprentice segment of Fantasia, complete with the red robe and blue wizard's hat. Pothole italicized
12. Pantheon.Costumes: Because of his draconic steed, Sulekh, Malekith takes his time to visit the Dragons Sub-House in an effort to capture and tame a few dragons for the Dark Elves to use as mounts. This is also mutual for Prehistoric Beasts as Malekith and several Dark Elves have mounted creatures known as the Cold Ones. So far, Malekith has taken an interest on various tyrannosaurs to have as a secondary mount should Sulekh become unavailable. This caught the attention of the Gang of Seven, who are fiercely opposed to him, knowing that Malekith would likely capture dinosaurs for his own nefarious uses.
13. PhineasAndFerb.Tropes J To P:
    • A Tyrannosaurus serves as the main antagonist of "It's About Time!" That same T. rex would later appear in cameos throughout the show.
    • In the comic "Dino-Might!", the boys resurrect a T. rex that Isabella names "Fluffy" (because he isn't fluffy). Fluffy proves to be a lot friendlier and tamer than the previous T. rex encountered, although it becomes a problem when he starts chasing after Candace on her bike due to a game of fetch going awry.
14. Recap.Primeval S 5 E 5: A Tyrannosaurus rex arrives in London at the start of the episode. Fitting, it ends up being the creature to make the anomalies public.
15. Recap.Xiaolin Showdown Oil In The Family: Wuya goes to an oil platform to revive an adult dinosaur rather than the babies created from Jack Spicer's small oil supplies in his lab. The adult dinosaur is, of course, a Tyrannosaurus rex. When Chase enhances the dinosaur's IQ with the Eagle Scope, the T-Rex turns on Wuya and plans to use the Rio Reverso to create its own army of dinosaurs. The T-Rex is nearly invulnerable and acts like a stereotypical British gentleman, even showing a love for chess.
16. Series.Really Wild Animals: The king of the dinosaurs naturally gets some focus in "Dinosaurs and Other Creature Features".
17. Series.The Truth About Killer Dinosaurs: Tyrannosaurus rex is the star of the first episode.
18. Summon Bigger Fish: Two examples with wicks, both italicized, one in spoiler markup
    • The Jurassic Park card game allows you to summon a Tyrannosaurus to scare off the smaller predators, the venom-spitting Dilophosaurus and pack-hunting Velociraptor. Or even another Tyrannosaurus. But then you have to fight off the T. rex as well, after it scares the others off.
    • In Jurassic World, once the Velociraptors aren't enough to take the Indominus rex down, Claire sics the Tyrannosaurus Rex at her. However, she isn't enough either, and has to work with the lead raptor to actually get the better of the I. rex. And they conclude the battle by literally summoning a bigger fish, dragging the I. rex close enough to the Mosasaurus pond.
19. Toys.Lego Dino: A Tyrannosaurus rex appears in two sets, and they are naturally the biggest and most expensive ones of the line. The T. rex is also the icon mascot of the LEGO Dino theme as a whole.
20. Trivia.Jitsu Squad: A couple of scrapped bosses can be seen in screenshots, including a T-Rex named Riptail ^note  possibly in Primal Rage , a giant Egyptian statue and a Dark Action Girl villainess named Rocket, who lives up to her name by attacking the Jitsu Squad with a lion-headed bazooka.
21. WebAnimation.Mighty Magiswords: While all the dinosaurs and pterosaurs in the Dinosaur Kingdom are stylized and cartoony (though the quadrupedal dinosaurs have more realistic postures), their Tyrannosaurus rex king very clearly has feathers on his head, back and arms. He even confirms having feathers in "Biggest Fan". Pothole italicized already
22. WesternAnimation.Scooby Doo And The Cyber Chase: A T. rex is fought in Level 3.
23. YMMV.The Meg: They Wasted a Perfectly Good Plot: Sadly, the film doesn't adapt one of the most famous scenes from the original novel, which is a confrontation between a Megalodon and a Tyrannosaurus rex. Who wouldn't want to see that on the big screen? Pothole italicized

1. BigGood.Fan Works: Rexy in It's not the Raptor DNA. She commands the fear, respect, and/or love of everybody and every creature on Isla Nublar, and is the one who tries to guide Elise and the younger dinosaurs toward a better future.
2. Characters.The Dresden Files The Kemmlerites: Karmic Death: Sue eats him.
3. FluffyTheTerrible.Fan Works: Prehistoric Park: Returned from Extinction: Besides Terence and Matilda from Prehistoric Park and Big Al from The Ballad of Big Al, there's also Finn the Acrocanthosaurus, who is a carnivorous dinosaur bigger than Al but smaller than Terence and Matilda.
4. Pantheon.Food: Linked in a portfolio
5. TabletopGame.Smash Up: The Dinosaurs' King Rex.
6. YMMV.Lost Eden: Complete Monster: Moorkus Rex is an evil dinosaur tyrant who leads an army of Tyranns to conquer all other kingdoms. He doesn't want to conquer the world so much as simply dismember it, and his mooks cut swaths of destruction wherever they go. His real power is illusion and fakery—he lies every time he opens his mouth, trying to sow confusion and despair, while the real threat—the Tyrann—destroys everything in their path. It unfortunately works all too well on Dina, whom he tricked into believing he had gruesomely murdered her mate.

1. Art.North America Portrait Of A Continent: The World's Largest Dinosaur appears northeast of Calgary. Doesn't even seem to be about a T-Rex
2. Literature.Tales Of Kaimere: Zigzagged. At first, tyrannosaurs were the dominant predators in the known world for 17 million years. That was until a mass extinction event in the known world brought them to ruin, and the only ones left are small omnivores. Megaraptorans now occupy the same niche of apex predators in the known world.
3. VideoGame.Dino Rex: Tyrannosaurus rex makes an appeareance, naturally, as one of the playable dinos as well as the Big Bad's chosen dino. Unfortunately, this take on the tyrant king is extremely portly, stubby, not particularly terrifying or impressive and also purple. Sound familiar?
4. WesternAnimation.Minions: In the prehistoric era, the Minions decide to serve a Tyrannosaurus rex after the latter squashed the emerging amphibian that was their previous master. It didn't last long when they accidentally caused a boulder rolling towards their master, sending the dinosaur into a Lava Pit. Sort of a mix of the first two folders, but without enough context for either.