History Monster / TheDCU

* ''ComicBook/TheGoldenAge'': The BigBadDuumvirate, UsefulNotes/AdolfHitler and the Ultra-Humanite, aim to TakeOverTheWorld. During UsefulNotes/WorldWarII, the Ultra-Humanite performed inhumane experiments on German prisoners to perfect his process to [[GrandTheftMe take over bodies]], killing all the scientists who helped him, before placing his mind inside superhero Tex Thompson. Becoming an American senator, the Ultra-Humanite places Hitler's brain inside another superhero, Dynaman, and the duo begin plotting to take over America and launch a war on all Communist countries. When exposed at a press conference, Hitler attacks, killing many civilians in his rampage, while ranting he will use his newfound power to conquer the planet with force.

* [[OverlordJr Mongul II]] has dedicated his life to aping and surpassing [[Characters/DCComicsMongul his equally unpleasant father]]. During his first appearance in Green Lantern, Mongul II used the Black Mercy plants to trap Hal Jordan and [[Characters/GreenArrowTheCharacter Oliver Queen]] in a fantasy world; he subsequently murdered his sister, Mongal, and kept her corpse as a trophy. When Mongul II really comes into his own, however, is after gaining a [[Characters/GLSinestroCorps Sinestro Corps Ring]] (by murdering its owner). Taking control of the Black Mercy homeworld, Mongul II uses his ring to alter the genetics of the Black Mercies so that they will trap their victims in their worst nightmares, instead of their ideal fantasies. He coerces the benevolent Mother Mercy into aiding him by threatening to make her eat her own children if she does not. Defeated by the Green Lanterns, Mongul II escapes from prison, seizes control of the Sinestro Corps by killing anybody who disagrees with him (or even annoys him in the slightest), rips out [[TheDragon Arkillo]]'s tongue, and overruns the planet Daxam, slaughtering or enslaving the population. Beaten off by Sodam Yat and Arisia, Mongul II later arrives on Korugar, and is in the process of having the citizenry strung up along the streets when his reign is finally halted by the return of [[Characters/GreenLanternThaalSinestro Sinestro]].

* ''ComicBook/JusticeLeagueMightyMorphinPowerRangers'': [[Characters/SupermanBrainiacCharacter Brainiac]] and Lord Zedd [[BigBadDuumvirate team up to collect Angel Grove]]. After finding himself on the DC Earth, Zedd convinces Brainiac to allow him to enlarge some of his collection as a distraction while Brainiac takes the Zords and Coins. The two then leave the groups stranded on the DC Earth as they escape to the dimension to take Angel Grove. The Rangers and the Justice League arrive in time to see them collecting Angel Grove and planning to destroy the Earth. When a group infiltrates Brainiac's ship, Brainiac forces Cyborg to attack his friends. The group eventually find a room full of other captured cities. Taking Alpha 5 prisoner, Brainiac tries to turn him to his side, before trying to kill Superman with Kryptonite. Meanwhile Zedd leads a group of Monsters in helping Brainiac and shrinks Zordon, so he can [[ForcedToWatch force Zordon to watch]] as he destroys the world he swore to protect.
* ''ComicBook/{{Justice}}'': [[Characters/SupermanBrainiacCharacter Brainiac]], the ultimate mastermind behind the LegionOfDoom and [[TheChessmaster the architect of most of the disasters in the story]], is an [[RoboticPsychopath advanced android]] created by the Computer Tyrants of Colu. When the Computer Tyrants were destroyed by the people they had oppressed, Brainiac decides to create his own version of Colu on Earth, by killing most of humanity and turning the rest into copies of himself. To do this, Brainiac meets with [[ComicBook/{{Shazam}} Captain Marvel]] villain [[MadScientist Doctor Sivana]], who has been developing [[MindControlDevice tiny robot worms that control the minds of others]]. Brainiac takes his research and uses it to [[DrivenToMadness drive Doctor Sivana insane]]. Brainiac forms his own Legion of Doom, [[BrainwashedAndCrazy mind-controlling most of the members]], except for Lex Luthor who has a force field that protects him from Brainiac's devices. Brainiac has Black Manta kidnap Aquaman, with Brainiac wanting to learn more about his telepathy by cutting open his brain. Brainiac has the various Legion of Doom members [[FalselyReformedVillain pretend to have turned good and wanting to help humanity]], with several of them creating cities for the sick and needy, that will provided technology that will cure their illnesses and provided them with a good standard of life. Brainiac's micro worms have also let him take control of Earth's nuclear stockpile, with Brainiac planning to nuke most of the world to destroy humanity. When the Justice League reveal to Luthor that Brainiac has betrayed him, Luthor sabotages his plans and forces him to retreat to his ship. Brainiac, unhappy about losing, decides to set off the nukes anyway and destroy humanity.

* ''ComicBook/{{Planetary}}'': [[MadScientist Randall Dowling]] is the leader of The Four, an evil analogue of ComicBook/TheFantasticFour. Having made contact with another world, Dowling plans to assist it in conquering Earth in exchange for power. For decades, he has kept Earth's technology at its current level by [[WithholdingTheCure withholding or suppressing discoveries]] that could eradicate disease--including the cure for cancer--and save countless lives. in addition, Dowling locates children with budding technological skill able to advance humanity. He has their families killed in "accidents", before tormenting and brainwashing the kids into using their talents to stifle humanity's growth, with bombs planted in them in case anyone tries to rescue them. Using the RedScare as a threat, Dowling also creates "City Zero", where suspected "spies" are rounded up and subjected to inhuman experiments, kept alive in horrible agony for Dowling's purposes. To store his experiments and weapons, Dowling also wiped out all life on a planet, just to ensure it was freed for storage. Treating his fellow members of the Four as disposable as well, Dowling's only care is [[ItsAllAboutMe for his own ego, advancement and power]], no matter how many worlds he sacrifices.