Drama. It's the thing behind all superhero stories. The action is awesome but the reason people come, other than the crazy costumes and over-the-top action, is to see how the drama unfolds. And what better source of drama is there than family? Family drama can be some of the most surprising and tragic drama out there. Comic book writers have known this for decades, and so have woven family drama into pretty much every famous superhero comic to ever exist. It all makes for great stories. Comic book writers have been drawing on the well of sibling rivalry for years. Ocean Master’s feud with Aquaman. Thor’s with Loki. DC’s Cain and Abel. Barbara Gordon has a criminal for a brother. Of course, positive bonds between siblings make for great stories too. Morpheus and his brothers and sisters of the Endless. Wanda and Pietro Maximoff. Wonder Woman and her sisters adventuring as the Wonder Family.

That's where writers have to get creative. Or just plain crazy. One look at either the Marvel or DC wiki shows that comic book writers love creating secret family members for our heroes.  Some secret family members are villains, who are resentful that the heroes had lives they never could. The brother or sister you never knew Batman or Superman or Wonder Woman had — will they end up friend or foe, hero or villain, or just an obscure answer in some trivia game? Here, is a list of 25 heroes that we almost forgot were related or never knew had family:

25 NICK FURY AND SCORPIO - BROTHERS

Nick Fury’s younger brother Jake had a character arc driven by jealousy, failure, and retcons. Initially a pacifist, Jake joined the military in WWII, but only wound up feeling more resentful he couldn’t equal Nick Fury's heroism.

Years later Jake went up against S.H.I.E.L.D as the mysterious villain Scorpio, who was weilding a cosmic key to destroy his brother. After multiple added defeats and failures, he finally took himself out in despair. It wasn't a bad character arc, but Jake was a prominent enough character that later writers couldn’t leave him alone.

24 SELINA KYLE AND KING OF THE CATS - SIBLINGS

Catwoman spent a decade as Batman’s frenemy before she was given an origin. It turned out Selina Kyle only turned to crime after losing her memory, and upon recovering it, she reformed. Two years later, in Batman #69, Batman worries she’s backsliding.

A new crook, King of the Cats, is apparently romancing her to join him on the dark side. The King is Selina’s brother Karl. Who would have thought? This did not last long though, as Kyle eventually reformed, and promptly vanished from comics.

23 DARKSEID AND INFINITY MAN - BROTHERS

It took the superhero Infinity Man more than twenty years to get an origin. If he’d had a choice, he’d probably rather not have been Darkseid’s brother. Infinity Man was an unexplained oddity in Jack Kirby’s Forever People.

Two decades later, Jack Kirby’s Fourth World introduced us Drax, the brother we never knew Darkseid had. When Drax tries tapping the power of something called the Infinity Pit, Darkseid fatally sabotages the experiment. Instead of losing his life, Drax becomes Infinity Man and accepts the mission of protecting the Forever People.

22 THE GRIM REAPER AND VISION - BROTHERS

This is as complicated as family relations get. When Ultron created the synthozoid, he used the “brain pattern” of Simon Williams, AKA Wonder Man, as a template for the Vision’s mind. This was all okay until his brother Eric learned about it. The Grim Reaper had sworn to destroy the Avengers for taking out his brother.

When he learned the Vision was, in some sense, Simon reborn, he tried to urge Vision to switch teams but Vision said no. When Simon rose from the dead, though, Vision bonded with him much more easily. That infuriated Eric, who felt he’d lost both brothers again.

21 CHARLES XAVIER AND CASSANDRA - SIBLINGS

For those who subscribe to the school of thought that Charles Xavier is evil, nothing much beats taking out his twin sister. Even as a fetus, Professor X had enough psychic ability to sense that his sibling, a fellow mutant telepath, was tainted by evil. He attempted to destroy her, but she survived as a mass of cells.

Years later, she attained an adult human form and began a war of revenge against Charles and the X-Men. From Cassandra’s view, it’s actually a war of survival. In her heart, she feels it’s the womb all over again, and only one of them can survive to birth.

20 DORMAMMU AND UMAR - SIBLINGS

Once you beat a demon-god as powerful as Dormammu, what do you do for an encore? For Stan Lee, the answer was to give Dormammu an equally evil sister to replace him in Doctor Strange’s rogue's gallery. Umar the Unrelenting debuted in Strange Tales #150, just a few issues after Dormammu perished fighting the cosmic being Eternity (he got better later).

She explained that her flame-headed brother had trapped her in a netherworld for fear of her power; his death freed her, and Stephen once again had an omega-level threat to contend with. However, Umar never lived up to her boasts of being even more awesome than her brother.

19 BATMAN AND THOMAS JR - BROTHERS

By 1974’s World’s Finest #223, everyone knew that Batman was an only child. Well, turns out we were wrong. Hunting a criminal, Batman discovers it’s his brother Thomas Jr., brain-damaged and locked away in an asylum before Bruce was born. Surprisingly, Thomas really is the bad guy, though it’s hand-waved away as the real villain tricking him into it.

To top off the story, the ghostly Deadman takes over Thomas’ body for his own use. Batman eventually caught up with Deadman in #227 and the ghost reluctantly gave up his new body. Thomas Jr. then heroically sacrificed himself to save his brother. Everyone was now free to forget this addition to the Wayne family tree.

18 MYSTIQUE AND NIGHTCRAWLER - MOTHER AND SON

In the movies, cartoons, and comics, the background of Mystique is typically that she became angry about her treatment from humans due to her appearance. She left Professor X’s crusade in order to join Magneto in his quest to eliminate humans. At different times, it’s revealed that Nightcrawler is, in fact, her son.

Both were erroneously seen as demons, though at times Mystique embraced that idea in her hatred for humanity. Nightcrawler’s father, Azazel, is an immortal who also bred a group of mutants known as the Neyaphem.

17 SWAMP THING AND EDWARD HOLLAND - BROTHERS

Swamp Thing’s brother Edward Holland appeared in two Swamp Thing issues fans would prefer to pretend don't exist. In a Hail Mary reboot play, Swamp Thing asks his jealous brother Edward for a cure. To prove he’s the smart one in the family, Edward happily turns Swamp Thing back to Alec Holland.

The end game was apparently to shift from horror to superheroes by turning Alec into Bruce Banner. This never saw the light of day as Swamp Thing #25 was never published. Alec reverted to classic Swamp Thing in a guest appearance a year later. Edward hasn't been seen or remembered since.

16 ETRIGAN AND MERLIN - BROTHERS

When a character gets retconned, it feels as though it is a battle between powers who keep shifting history at whim. A perfect example would be Etrigan and his brother, Merlin. As conceived by Jack Kirby, Etrigan was a demon bound into service by Merlin. Savage at heart, he was forced to take human form and use his powers to fight evil magic.

Fifteen years later, Matt Wagner did a reboot that kept Kirby’s origin intact but added a backstory twist. Etrigan’s father, Belial, had been unable to control his son, so he sired a half-human child whose magic could bind Etrigan. That half-brother was Merlin.

15 SABRETOOTH AND WOLVERINE - BROTHERS

There are different origin stories about how supervillain Sabretooth and Wolverine are related. In some of the movies, Wolverine and Sabretooth were supposed to be brothers. In the original comics, they were father and son. Throughout the years, different writers have had differing views on their relationship.

Sabretooth is portrayed at times as not having much in the way of a healthy support system, while Wolverine had the X-Men. Additionally, in the movie Logan, Wolverine has a daughter. She was made from his DNA for a super soldier program.

14 STEPHEN AND VICTOR STRANGE - BROTHERS

We spent thirty years without knowing Doctor Strange had a brother, and then find out that he did. Stephen explained that a furious sibling argument in his surgeon days led to Vic getting struck by a speeding car. Guilt-ridden, Stephen placed the injured Victor in cryo but felt too ashamed to tell anyone about him.

When Victor revived, it turned out a spell Stephen used to try healing him had turned him into a vampire instead. Victor struggled to deal with his new bloodlust for four years. Finally, he won his struggle, but only by staking himself. Nobody's resurrected him since.

13 J'ONN J'ONZZ AND MA'ALEFA'AK - BROTHERS

J’Onn J’onzz’s brother, Ma’alefa’ak, was so evil, he wiped out their entire planet. The late 1990s Martian Manhunter series added yet another reboot to the many in J’Onn’s history. Mars had been wiped out millions of years prior and Malefic, a worshiper of Darkseid, had been stripped of his telepathy after attacking J'Onn's wife.

He retaliated by unleashing a telepathic plague that caused victims to burn themselves. Immune to what he'd wrought, Malefic delighted in watching his entire race's destruction. When Ma'alefa'ak learned J'Onn had survived, he dedicated himself to destroying J’Onn on Earth. Appropriately he went down in flames, the same fate he’d brought down on his people.

12 TERRA AND GEO-FORCE - SIBLINGS

Giving the traitorous Teen Titan Terra a sibling resolved an awkward impasse at DC. Marv Wolfman and George Perez had introduced her at roughly the same time Mike Barr introduced Geo-Force, another earth-powered hero, as a member of the Outsiders. When it looked like overkill, they solved the impasse rather ingeniously.

Rather than drop one character, the writers hit on a solution: make them siblings. Prince Brion of Markovia gained superpowers through an experiment; his sister Tara fooled with the same equipment to gain hers. Despite her utter evil, Tara genuinely loved her brother and vice versa. Instead of looking like an unlikely coincidence, turning them into her siblings actually made them more interesting.

11 JOHNNY BLAZE AND DAN KETCH - BROTHERS

Marvel’s Harley-riding Ghost Rider, Johnny Blaze, started as an orphan, then wound up with one of the most complicated family histories at Marvel. After Johnny exorcized the demon Zarathos who had possessed him for years, Marvel introduced a new Ghost Rider, Dan Ketch, with different powers. Hearing about Dan, Johnny felt obligated to investigate, and discovered he had a brother.

More than that — a lineage. Dan’s version of Ghost Rider was a curse that befell the eldest in every generation of their family. Their Mom had saved Johnny from the curse, unaware it would strike Dan instead, or that Johnny would end up a different kind of Ghost Rider. Talk about complications.

10 THOR AND HELA - SIBLINGS

Last year's Thor: Ragnarok did a lot more than setting up Thanos' brutal attack in Infinity War. It also introduced Hela, the secret sister Thor never knew he had. In the comics, all Asgardians are technically related. But in the movies, Asgardians are more akin to aliens. They're just really powerful beings that used to visit Earth and were mistaken for gods. So they have family drama and birth parents just like we do.

Thor's family drama involved his father exiling his sister for being a warmongering psychopath. When Odin finally faded away, Hela came back to claim the throne and begin her conquest anew. Naturally, this resulted in a realm-shaking battle that caused the destruction of Asgard itself.

9 MILES MORALES AND THE PROWLER - UNCLE AND NEPHEW

The Prowler (played by Donald Glover in Spider-Man: Homecoming) has had multiple versions but is most well-known as Aaron Davis and the uncle of Miles Morales, who is one of the versions of Spider-Man after Peter Parker. Miles became Spider-Man after being bitten by another engineered spider, much like Parker.

Miles is later recruited for S.H.I.E.L.D. and meets both an alternate-dimension Peter Parker and the Peter Parker of that dimension resurrected. Miles later fights his uncle Aaron, whose weapons malfunction and end his life.

8 COLOSSUS AND MAGIK - SIBLINGS

Magik, known as Illyana Rasputin, is the younger sister of Colossus. She is a sorceress and has been trained in hand-to-hand combat and other skills. Though she was tortured and attempts were made to corrupt her soul, she was rescued and continued to be a superhero.

Her brother, Colossus, is a metallic mutant and also a member of the X-Men. At one point, after entering a mystical gateway, his memory was wiped clean and he lived life as an artist. His memory was eventually restored and he returned to fighting battles alongside the X-Men.

7 SCARLET WITCH, QUICKSILVER AND MAGNETO - FATHER AND CHILDREN

Magneto is the father of Quicksilver and Scarlet Witch, both mutants with strong powers. However, in the movie Avengers: Age of Ultron, Quicksilver and Scarlet Witch were given different backstories and portrayed as being made by an elite/secret program. In X-Men: Apocalypse, Quicksilver was aware that Magneto is his father.

However, Magneto is not aware that Quicksilver is his son. Due to previous complications with the rights to X-Men, Quicksilver and Scarlet Witch’s stories needed to be changed, and there’s some speculation as to how their storylines will progress given the new Disney/Fox deal.

6 CABLE AND CYCLOPS - FATHER AND SON

Cable's role as a time-traveling assassin and antagonistic relationship with Deadpool seems to be taking the spotlight in Deadpool 2. And while Cable and Deadpool have had an entertaining comics run together, Cable's story goes far beyond that. In fact, he was introduced as part of the X-Men story proper. Moviegoers might not know that Cable is actually the son of X-Man Cyclops.

Obviously, there's a bit of a hiccup with their ages, which can be explained by the whole time travel thing. Cable is Cyclops' son from a ruined future. Good news is, he meets the current-day version of his father when he travels back in time to stop his future from coming to pass.