!!The comicbook:

* AuthorsSavingThrow:
** The first arc of the fourth series is dedicated to undoing everything that occurred in Creator/BrianKVaughan's run.
** The ''ComicBook/{{New 52}}'' was this for the character, effectively declaring ''ComicBook/BrightestDay'' and ''The Search For Swamp Thing'' non-canon after that mini-series killed off Swamp Thing in favor of Creator/GeoffJohns's hack decision to invalidate Creator/AlanMoore's work, killing off Swamp Thing as written by Alan Moore and replacing him with Alec Holland, who was resurrected SOLELY so he could be turned into Swamp Thing via ''deus ex machina''.
** Even Creator/AlanMoore attempted to soft-pedal his retcon of Swamp Thing's origin by essentially having Abby and everyone else still treat Swampie as Alec Holland. Later writers essentially took the stance that Swamp Thing, for all intents and purposes ''is'' Alec Holland, insofar that he's a plant clone of him with all of his memories and personality, even if the real Alec Holland is dead.
* CanonDiscontinuity:
** Everything between Len Wein's last issue on the original series and the first issue of Saga of The Swamp Thing. Len Wein literally says this in the letters page: those stories '''did not happen'''.
** Mark Millar and Grant Morrison ''openly set out'' to do this ton everything between the ending of Moore's run and theirs.
* CompleteMonster:
** [[BigBad Anton Arcane]] is a MadScientist turned EvilSorcerer obsessed with immortality and its secrets. First seen attempting to steal the Swamp Thing's body, Arcane failed and died in the attempt. His soul, however, returned from hell to steal the body of his niece Abigail Arcane's husband, Matthew Cable. In the guise of Matthew, Anton raped Abigail and consigned her soul to hell in his place. In his new position on earth, Arcane attempted to drive reality itself to insanity, using the souls of resurrected serial killers to cause destruction as the innocent succumb to savage, homicidal urges.
** In the New 52, Anton Arcane's new incarnation is a being of boundless cruelty. In his pursuit of immortality, Arcane took over the elemental force of The Rot, [[DarkIsNotEvil the natural force of death and decay]] and subsumed it to his will. Arcane extends the Rot to devour all that lives and trap the world in deathless limbo he can rule. Arcane even forced his own nephew to be the Rot's avatar, devouring his mind from within. In Arcane's battles with Swamp Thing, Alec Holland saw a future where Arcane gruesomely tortured and beheaded Abigail and saw lobotomized clones Arcane had made of her as cannon fodder.
* CrowningMomentOfFunny: Batman explaining to the mayor of Gotham that insisting on InterspeciesRomance being illegal is somewhat ridiculous, concerning the fact how many aliens and other beings that aren't exactly human run around on Earth. Especially funny because of [[DeadpanSnarker the incredibly snarky way it was delivered by Batman.]]
--> '''Batman''': No ''exceptions'', I see. In ''that'' case I suggest you start rounding up all the ''other'' non-human beings who may be having relationships outside their ''species''.
--> '''Mayor''': What? What do you mean?
--> '''Batman''': I ''mean'', if you want to take this all the ''way'', [[WhatMeasureIsANonHuman non-humanity doesn't end with the Swamp Thing.]] Let me ''see''... You'll possibly have to arrest ComicBook/{{Hawkman}}... And ComicBook/{{Metamorpho}}... And there's also Starfire, from the [[ComicBook/TeenTitans Titans.]] Her race evolved from ''cats'', I believe... The ComicBook/MartianManhunter, obviously... ComicBook/CaptainAtom... And then of course there's '''What's'''-'''His'''-'''Name'''... [[Franchise/{{Superman}} The one who lives in Metropolis.]]
--> '''Mayor''': [[OhCrap *gapes*]]
* FanonDiscontinuity: People tend to view the series solely in terms of the Creator/AlanMoore run, which may be because the rest of it has either never been collected in trade form or is otherwise notoriously difficult to find. It's generally accepted that the Wrightson-Wein run is pretty good and that the tail end of the Plasko run is required reading to fully get the Alan Moore run, while the Creator/BrianKVaughan run...isn't.
** Doug Wheeler's run often falls into this almost by accident, since it was the only run to be totally and utterly ''forgettable''. Even with the benefit of hindsight it doesn't really have any fans.
** Creator/NancyACollins' run has its share of (mild) detractors; she basically reset the series to the end of Alan Moore's run with a Swamp Thing that was (relatively) mainstream-friendly and akin to the Wrightson/Wein and Plasko runs, as she concentrated more on CharacterDevelopment, exploration of Cajun culture and an expanded supporting cast than horror. (Though it's worth noting [[ApprovalOfGod Alan Moore was a fan of her work on the character.]])
** Creator/MarkMillar's run too falls into this line as well, given the fact that it later came out that much of it was plotted (uncredited) by Creator/GrantMorrison to give the inexperienced Millar a leg up in the industry.
** ''ComicBook/BrightestDay'' and ''The Search For Swamp Thing'' were declared non-canon by Swamp Thing fans for the way they scorched earth EVERY Swamp Thing story written (as well as "The Anatomy Lesson") in favor of Creator/GeoffJohns going all "Captain Yesterday" and basically resurrecting Alec Holland simply so he could die again and become Swamp Thing FOR REAL and KILL THE ALAN MOORE VERSION, WHO WAS DESCRIBED AS BEING A CORRUPT PARODY OF SWAMP THING (granted, because Swamp Thing had been possessed by a Black Lantern Ring). Thankfully, the Comicbook/{{New 52}} flat out erased this from canon with the two books having been erased from canon.
* InvincibleVillain: Arcane during the ComicBook/{{New 52}} with new re-imagined Rot based powers that allow him to instantly kill, turn undead, and take control of any living thing that has even a single dead cell in it, anywhere in the entire world at any time. There are no functional limits to this power, only that champions of the Green and Red can sometimes resist it, but even then Arcane can just steal somebody's appearance and kill them before they can attack. He is also effectively unkillable as he can just reform a body from any corpse. Add to the fact that he's been around for centuries, effortlessly killing champions of both the Green and Red, until finally [[spoiler: infecting and taking over the entire world in the Rotworld segment along with killing and cloning Abby]]. He only loses not through any action of the heroes, when he's declared to be TOO successful as a villain, and [[spoiler: the Parliament of Rot withdraws their support and allow them to rewind time to before his victory]].
* MoralEventHorizon: Swamp Thing's daughter Tefé burns through all audience sympathy when she enforces a SadisticChoice on a man who started a forest fire, forcing him to choose between the life of his daughter and his wife. [[spoiler: She doesn't kill anyone, but his family get to see him choose.]]
* MyRealDaddy: Len Wein helped create Swamp Thing (and more), but Creator/AlanMoore's complete rewrite of the character is the one that lasted.
* RecycledScript: The time travel storyline that ended Rick Veitch's run has the same structure as a Len Wein issue (yes, a single issue) involving time travel. In both cases Swamp Thing would be thrown through time, would meet several of the locals, as well as an immortal that he keeps running into, and would eventually come in contact with an object (a crystal in the first case, the chunk of amber in the second) which would launch him back into the timestream. The big difference is that the Wein story Swamp Thing is moving forward in time, and the Veitch stories he's moving backwards. It's especially strange that Swamp Thing doesn't even {{Lampshade}} this, since time travel is actually a pretty uncommon experience for him.
* {{Squick}}: Anton Arcane, especially after he possesed Matt Cable's body.

!!The television series:

* MemeticMutation: Of the OpeningNarration. "Do not bring your evil here."

!!The animated series:

* EarWorm: "[[http://www.youtube.com/watch?v=1lU8vSa5se0 Swamp Thing, you are amazing...]]"

!!The video game:

* TheProblemWithLicensedGames