History BeCarefulWhatYouWishFor / MarvelUniverse

* ''Film/DoctorStrange2016'', Kaecilius is working to bring Dormammu to Earth as he believes that humans will achieve eternal life in Dormammu's Dark Dimension. In the conclusion, Strange [[spoiler: forces Dormammu to leave Earth and bring his followers with. Too late, Kaecilius realizes that Dormammu's offer of "eternal life" meant being transformed into a horrific mindless creature in everlasting agony inside Dormammu's home.]] Strange even lampshades it by stating "you're getting just what you want...I don't think you're gonna like it."

-->'''Mother Righteous''': You made a deal with a magician. A speller. A storyteller. You make a deal in a story, and it’s never quite what you wanted.

* At the beginning of ''ComicBook/AllNewXMen'', the Wolverine's Franchise/XMen are disgusted with their ex-teammate's ComicBook/{{Cyclops}} militaristic turn, to the point Iceman states he wishes young Scott saw what he's turned into. Beast somehow thinks that jeopardizing the entire time-space continuum is a great idea and brings the original X-Men to the future so they shame adult Scott. What happens instead is the Original Five are originally horrified, but then they discover the modern X-Men twisted and withheld facts to make adult Cyclops look worse. At the end of ''ComicBook/BattleOfTheAtom'' the Original Five decide Wolverine and his X-Men aren't better than adult Cyclops and can't be trusted, and they all join older Cyclops' side.
* ComicBook/DoctorStrange, in a moment of grief after losing Clea, wished he were dead. Enter [[DespairEventHorizon D'Spayre]], who put him through a series of {{Mind Screw}}s so painful that Strange nearly [[DrivenToSuicide took his own life]].
* ''ComicBook/BlackPanther'' gives us one during the 2016 arc. The two new antagonists, Zenzi and her [[TheDragon ally Tetu]] have been trying to overthrow T'Challa, but in order to put a more democratic government and just society. However, their benefactor (financially and technologically), the Iron Monger, warns Tenzu about one of the core tenants of revolution:

* When a powerful RealityWarper throws a fit, ''really'' bad things can happen. Shortly after ''ComicBook/HouseOfM'', the Scarlet Witch's LaserGuidedAmnesia that had suppressed the memories of her children was undone. In a fit of rage and grief, she wished for a world with no mutants. The result? '''M-Day'''.
* ''Comicbook/ImmortalXMen'': Sebastian Shaw makes a deal with Mother Righteous to gain control of Krakoa. He gets it ... during ''Comicbook/FallOfX'', when the island is abandoned and lacks all the financial and political clout Shaw was actually interested in. Righteous {{lampshades}} it:
-->'''Mother Righteous''': You made a deal with a magician. A speller. A storyteller. You make a deal in a story, and it’s never quite what you wanted.

** ''ComicBook/PlanetHulk''. After a fight between the Hulk and the Thing leaves Las Vegas in ruins and a dozen people dead, the Illuminati - specifically Tony Stark, Reed Richards, Doctor Strange, and Black Bolt (Professor X wasn't present and Namor voted no) - decided that Hulk was too dangerous to be allowed on Earth, so they came up with a plan to send him to a peaceful world with no intelligent life. The green behemoth always wanted to be left alone, why not grant his wish? [[UnspokenPlanGuarantee Of course, everything goes horribly wrong.]]

* In the ''ComicBook/{{Quasar}}'' storyline ''Starblast'', the BigBad Skeletron seeks to obtain [[ComicBook/TheNewUniverse the Star Brand]]. After a titanic battle with the Stranger, he gets his hands on the power, only to find out the Stranger stranded him in the now-lifeless home of the New Universe, the Stranger having pulled its Earth to the 616 universe

* ''ComicBook/XMen'': The core problem with the Sentinels, whose prime directive is some variant of 'protect humans from mutants'. They keep being rebuilt because some mutant-hating bigot or other doesn't realize that mutants ''are'' human, with the X-gene being a genetic quirk comparable to having red hair or being XXY male. This tends to lead to [[Franchise/{{Terminator}} Skynet]] [[KillAllHumans impressions]].

** The 2011 "Heart of the Monster" arc in [[ComicBook/IncredibleHulk The Incredible Hulks]] is built around this trope - Hulk and his team encounter a Wishing Well. Everyone involved knows what it will twist every wish it grants. What they don't know is the intentions of the Red She-Hulk, who used it to wish doom on her ex-husband.... if she meant it, his circumstances are going to improve, but if she ''liked'' him... [[spoiler:As it turns out, she hated him at the time, meaning all of his dreams briefly came true.]]

* The beginning of ''ComicBook/ImmortalHulk'' introduces Jackie [=McGee=], a young reporter who wants to become a Hulk to express her rage at systemic racism. She doesn't quite realize what a horror-show the Hulk has made out of Bruce Banner's life until she meets him in person.

* When a powerful RealityWarper throws a fit, ''really'' bad things can happen. Shortly after ''ComicBook/HouseOfM'', the Scarlet Witch's LaserGuidedAmnesia that had suppressed the memories of her children was undone. In a rage of fit and grief, she wished for a world with no mutants. The result? '''M-Day'''.

** ''ComicBook/PlanetHulk''. After a fight between the Hulk and the Thing leaves Las Vegas in ruins and a dozen people dead, the Illuminati - specifically Tony Stark, Reed Richards, Doctor Strange, and Black Bolt - decided that Hulk was too dangerous to be allowed on Earth, so they came up with a plan to send him to a peaceful world with no intelligent life. The green behemoth always wanted to be left alone, why not grant his wish? [[UnspokenPlanGuarantee Of course, everything goes horribly wrong.]]

* ''ComicBook/XMen'': The core problem with the Sentinels, whose prime directive is some variant of 'protect humans from mutants'. They keep being rebuilt because some mutant-hating bigot or other doesn't realize that mutants ''are'' human, with the X-gene being a genetic quirk comparable to having red hair or being XXY male. This tends to lead to [[Film/{{Terminator}} Skynet]] [[KillAllHumans impressions]].

* ''Series/AgentsOfSHIELD'': In Season 4, Dr. Radcliffe and Aida created an entire virtual world called the Framework to keep agents docile while they are replaced by Life Model Decoys. Aida was instructed to fix the single greatest regret of every new entry, and had to reboot the simulation several times to reconcile them all together. The problem is, her "fixes" only addressed the basic problem with no consideration for context, so the agents aren't 'themselves with less angst', but very different people living in a world where [[spoiler:HYDRA won, and their emblem is emblazoned on the side of S.H.I.E.L.D.'s headquarters]]. Later episodes detail the specific changes:
** May killed a little girl because she was a crazy Inhuman with brainwashing powers who [[EmotionEater gets high off the suffering of other people]]. All May wanted was to save the girl. In the Framework, she did. [[spoiler:Except the girl was still a crazy Inhuman with brainwashing powers, and went on to cause a very public incident at the Cambridge, Massachusetts school she was placed in after being brought to America. HYDRA happily capitalized on this incident to get themselves in power by stoking anti-Inhuman sentiment sky-high and presenting themselves as the only solution to the Inhuman menace. May now regrets ''not'' killing the girl far more than she ever regretted killing her, and blames herself for allowing the Cambridge Incident to occur. She now loyally serves HYDRA as an Inhuman hunter]].

* ''Series/AgentsOfSHIELD'': In Season 4, Dr. Radcliffe and Aida created an entire virtual world called the Framework to keep agents docile while they are replaced by Life Model Decoys. Aida was instructed to fix the single greatest regret of every new entry, and had to reboot the simulation several times to reconcile them all together. The problem is, she allowed these "fixes" to play out to their logical conclusion, so instead of the agents being themselves just minus their greatest regret, they are completely different people, living in a world where [[spoiler:HYDRA won, and their emblem is emblazoned on the side of S.H.I.E.L.D.'s headquarters]]. Later episodes detail the specific changes:

!!Franchise/MarvelUniverse

* ''ComicBook/UltimateFF'': Subverted. Without more ideas on how to deal with the monsters of the incursion, the team (except Sue) wishes that Reed was there. Then, Coulson sent the cavalry. Sue thought that it was Reed, all the red herrings suggested that it was Reed, but no: it was Victor Van Damme.