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Anime and Manga
- Legacy of the Rasengan by Tellemicus Sundance has spawned its own fan verse in recent years, especially now since he has given up on Chuuten and has chosen a successor to continue it.
- The Sailor Moon Expanded community was a prime example of a Fan Verse. The writings of over a dozen authors were combined with the goal of adding new and interesting characters, stories, and information to the Sailor Moon universe without contradicting established canon. In many instances, particularly in the works of Mark Latus, the expanded material is more interesting and concise than the original source. It hasn't been updated with new material in quite some time, however.
- Richard Lawson created two such Fan Verses for Ranma ˝ during the late 1990s:
- Thy Inward Love is a continuation fic that picks up at the end of the Ranma manga and attempts to resolve the series' Love Dodecahedron and corresponding web of honor entanglements; in addition to the main storyline there are several prequels and side stories, and a sequel series.
- Thy Outward Part is an Alternate Universe Fic where Ranma is locked in female form permanently in the wake of a different, more tragic outcome to the Chisuiton arc of the manga. Pushed away by a homophobic Akane, Ranma goes to college alone and unhappy, until she meets a young man who finds her attractive and wants to learn martial arts from her. Long thought to be "closed", this 'verse was recently revived when Lawson started writing stories in it again.
- Lawson has also written a series of five All Purpose Cultural Catgirl Nuku Nuku fics that describe the remarkable life and evolution of the ostensibly comedic title character.
- There is a truly awesome one of these for Urusei Yatsura called ''The Senior Year'', started by Fred Herriot. It takes the original setting, characters and runs with them, adding new and interesting characters, places, cultures (including many ShoutOuts to other anime) and spans at least 20 years through its various sequels.
- The Neon Genesis: Goddess series by Slayer combines Neon Genesis Evangelion and Ah! My Goddess for an interesting effect on the story of NGE. It also has about two dozen spinoffs and continuations.
- Neon Genesis Evangelion R was all written by one author but it has two branching continuities and has itself spawned fan fiction (such as Neon Genesis Evangelion: R: Redemption). It's also unusually detailed for a piece of fan fiction and elaborates substantially on the nature of the Angels compared with the original series.
- The Superwomen of Eva series (of which Superwomen of Eva 2: Lone Heir of Krypton is one example) has several stories that cross over amongst themselves (in a very Broad Strokes fashion), creating a shared universe (and a few alternate universes to the two "main" ones). Of interest is that the series has two different shared universes, one which takes inspiration from Marvel Comics and one which takes inspiration from DC Comics.
- MegaTokyo has spawned at least three Fan Verses to date. The oldest is the MegaTokyo: the Clans game that started in 2001 on the MegaTokyo Forum, and which is still going (look for threads labled [Mt:tC] in the RP subforum). More recently is the Story Discussion Fanworks game that is hosted off site in its own dedicated forum. Most recently is the energetic Megatokyo Campfire Story that can be found in the fanart subforum.
- In Naruto fandom, the Lace and Strawberries or Saki-chan Fan Verse, started by Asuka Kureru or Askerian. The basic premise is Sasuke dealing with his issues via cross-dressing as a Gothic Lolita that goes by the name of Saki. Not actually crack. While she has written only three fics in this verse, the number of fan-fan works has possibly reached triple digits, and includes writers such as chibirisu-chan, ice-dark elf, and crazy-toffee.
- The Continuance of Haruhi Suzumiya by Hejin 57. This series branches directly off the anime adaptation of The Melancholy of Haruhi Suzumiya. Starting with The Attraction of Haruhi Suzumiya, this story has already seen three completed sequels, and another already in the works. Set for six stories in total, this fanfic series easily qualifies as a fanverse. All the stories in the series are great, too!
- One Piece has one in the Crew Of The Axe due to the main fanfic crossing over with several other fics, and those fics crossing over with more fics.
- The very NSFW fanverse Wild Horses and Pokegirls where Ranma is sent to a very twisted Pokemon altverse where, at some point in history, women were crossed with pokemon so that now, everyone has some level of poke DNA, and very few girls look human, especially after puberty. Those that do, don't usually stay that way for long. It's very much a fetish fanfic crossover, but it's been around for a long time and spawned many storylines, including multiple interactive "Choose Your Own Adventure" style stories
- Debbie (Dai-chan) began The Powers of Crests universe for the Digimon fandom on Fanfiction Dot Net, which was expanded upon by Creedogmon, and an author named DayDreamer9 has begun a third imagining.
- Arceus Archives, otherwise known as the Archiverse, is one of these to the Pokémon fandom.
- The 1983: Doomsday Stories AU for Axis Powers Hetalia has expanded to included contributions from other artists and authors.
- The Ranma ˝ Elsewhere Fic Boy Scouts ˝ has had multiple authors (many of whom are also Self Inserted characters, some before writing and some after), and has two Spinoffs and a Sequel.
- An author named Kanius has a set of fan-anime verses. The first is Digimon Fusion Kai, which retells Dragon Ball Z under the Kai format with Digimon characters playing the roles of said characters. It is also a rewrite of his previous series back in 2001.
- YuYuGiDigiMoon is a massive fan crossover with Sailor Moon, Digimon, Yu-Gi-Oh!, and YuYu Hakusho to bring forth many adventures as Japan's superheroes.
- It also comes with their own AU based on Guilty Crown by one of his contributors called Guilty Crown: The Lost Kingdoms with Puella Magi Madoka Magica as guests and later on cameos with Sword Art Online.
- Likewise, the author of YYGDM and Digimon Fusion Kai, alongside contributors has an abridged series with the characters living in a shared universe alongside various pop culture. Shinnen New Year is also set as the series finale.
- The Elemental Chess Trilogy is effectively this. With four novel-length installments, plus one collection of side stories and a fifth volume currently in production, it is known as one of the largest Fullmetal Alchemist fanworks.
- The Pokemon fanfic Pokémon Reset Bloodlines has expanded with side stories by both the original and several other writers, covering a wide variety of characters with expanded backstory and lore in a new universe Ash Ketchum Peggy Sued himself into. The continuity as a whole has now been dubbed as the Resetverse.
- Batman has an epic series known as the "Cat Tales" universe which some people think of as better than some of the published stuff. It has lots of awesomeness for many characters, but the main thread is attempting to create a realistic romance between Batman and Catwoman without sacrificing any of their characters' awesomeness. This is mixed in with liberal amounts of drama, humor, believable character development, and tons of great action. The first story is A Girl's Gotta Protect Her Reputation. And best of all, the author is still going strong after 54 stories and nine years — the first chapter of the first story was published on March 8, 2001. With regular updates every few weeks, no less!
- Also has a fair number of sidestories in the same verse co-authored by others, fan-art and its own website, here
- There is a fanfic version of the Marvel Universe that puts much more of an emphasis on lesser-known heroes and villains, such as the 1990s superhero Sleepwalker, rather than mainstays such as Spider-Man, the Fantastic Four or Captain America, who usually guest star in the C-listers' own stories rather than get the main spotlight. Many aspects are also heavily reimagined, such as Gwen Stacy being alive and well as Peter Parker's one true love, and Mary Jane Watson developing her own spider-powers as Spider-Woman, with her own rogues gallery and supporting cast entirely separate from Peter's.
- There are several fanfics written by the same author using DC Comics heroes set during the 1940s mixing elements of modern continuity with Golden Age tropes. Word of God says the basic impetus of this retro-style Fan Verse was an excuse to write a story where Superman actually gets to punch out Hitler.
- On LiveJournal, the DC Universe RP of JLA Watchtower and its spinoff DC Nation has been going strong since 2004, using a combination of adapted DC Comics storylines and original plots. There have also been "flashback" posts that go into earlier parts of DC continuity.
- The best-known Watchmen fanverse is a magnificent Zombie AU, of all things.
- The Shadowchasers fanverse, started by the Fan Fiction great Black Panther, has spawned several continuing fanfics on fanfiction.net.
- The "Fanfic Domain", created by fanfiction.net's Crazyeight, is both Fan Verse and metafictional masterpiece. One of its central premises is that authors are bodily transported to the Fanfic Domain and meet characters face-to-face; canon events actually happened to the characters and they actually experience the fanfics into which they are written. Enter Fan Dumb, and with it, plot.
- Possibly the largest Fan Verse is Eyrie Productions' Undocumented Features, with nearly twenty years of work and a coherent setting spanning at least 500 years of in-story time (and thousands of years of history), and incorporating dozens upon dozens of sources.
- The Private Diary of Elizabeth Quatermain is a fic series which picks up where The League of Extraordinary Gentlemen movie left off. It took four years to write and stretched across five complete multi-chapter stories, plus a handful of side scenes and alternate points of view. The final installment crossed over with the same author's unfinished Sherlock Holmes fanfic, thus indicating that the two stories take place in the same continuity. It also spawned a few instances of Recursive Fanfiction from other writers.
- The Vantage Point series by Aggie2011 takes place in the Marvel Cinematic Universe, with focus on Black Widow, Hawkeye, and Agent Coulson. Fics are set pre- and post-Avengers, and are AU by virtue of having no canon for the events covered. World building is very Like Reality Unless Noted, but the inner workings of SHIELD and various missions are explored.
- The Black Crayons series is several Transformers stories, mostly set after the second film, which explore the franchise from the point of view of Annabelle Lennox. It all leads up to a re-written version of the third film which, among other things, keeps Mikaela in the plotline.
- The original, darker concept for Zootopia, where prejudice against predators was so strong that preds were forced to wear shock collars, was popular enough with fans to inspire a host of fan works set in "Zoodystopia".
- The MCU Rewrites by Madsthenerdygirl are an alternate telling of installments in the Marvel Cinematic Universe (specifically Avengers: Age of Ultron and Captain America: Civil War) with an expanded telling of events, more focus on certain characters, and bringing the MCU closer to the Marvel comic books.
- The DAYDverse, a darker take on Harry Potter started by Thanfiction and expanded upon, with the primary protagonist being Neville Longbottom. Starts with a parallel story to ''Literature/HarryPotterAndTheDeathlyHallows'' and continues with the second of three books called "Sluagh," as well as numerous one-shots, missing scenes, and character profiles.
- On the subject of Harry Potter fic, the Dangerverse arguably qualifies. Started by whydoyouneedtoknow (and yes, that is a The Incredibles reference), the story reimagines the canon. At last count the mainline story was at 1.18 million words and counting. As with the Dumbledore's Armyverse, there are numerous one-shots, missing scenes, and numerous Alternate Universe fics by the author. At last count there were at least four alternate universes written by other authors.
- Author bedlamsbard on LJ has three Narniaverses — Warsverse, Petaverse, and now possibly Casverse. Also Dustverse, which is really a continuation of Warsverse. Maybe.
- The Les Misérables fanfic Paris Burning is the root of one of these. The author of the initial fic and various other fans have taken the premise (Hetalia-esque personifications of cities, with a rather darker tone) and run with it to create stories that, at this stage, bear little relation to the events of Les Misérables itself.
Live Action TV
- At its height, Power Rangers had loads of these, including "Personality Conflicts" by Ellen Brand and "Earth Crystals" by Jeremy Ray Logsden. Sadly, neither of these have been updated in years.
- Star Traks - This is a parody Fan Verse for Star Trek, it covers TOS, TNG, and DS9. Also has an X-Files variant called Traks Files.
- Ambassadors of Liberty is a Stargate-verse RP site with several other settings in the pipelines.
- LiveJournal author miggy has provided Glee with the Mostverse, a small but growing set of continuation stories mostly centered around Rachel and Kurt going to college in the Big Applesauce and rooming together. It's remarkably in-character, not to mention Original Flavor.
- All of the Doctor Who stories on Rich's ComixBlog (possibly with the exception of Landry Walker's "Seeds of Destruction") are built around the same continuity as the blog's best-known fic The 10 Doctors. This universe excludes the Doctor Who Expanded Universe; and thanks to Crossovers, it also includes Forever Knight and Jem.
- Horseshoes and Hand Grenades by Green Phantom Queen has multiple stories revolving around other characters in the Kamen Rider Fourze universe getting into fights all because Gentaro went evil, along with a Perspective Flip for the first 13 chapters for Gentaro and more.
- DianeCastle's The Secret Return of Alex Mack and the 'Tera-Verse' has spawned twenty two recursive fanfics including two multiple story series. The writers constantly exchange information to make sure the worldbuilding is 'Diane' approved.
- Swing 123 and garfieldodie have a fairly consistent universe in their Calvin and Hobbes Fan Fics, with the first few fics being fake movies (one trilogy from each author), and the main connecting factor comes along in Retro Chill and Calvin and Hobbes: The Series from both of the authors, which uses characters from both of the trilogies (along with the side story "Prelude to a Season").
- Freedom City Play By Post is the largest online source for stories in the Freedom City setting. Characters use the Mutants & Masterminds rules set to make things a little more balanced than the usual collaborative free-form stories.
- The now-defunct Global Guardians PBEM Universe was the largest Shared Universe Champions Fan Verse on the net.
Theme Park Attractions
- The Haunted Mansion and the Hatbox Ghost is a fanverse created on DeviantArt by users Kelly-M-Mortal, Benthehyena and Scrooge Mac Duck. It focuses on the Haunted Mansion ride from the Disneyland parks, and includes short stories, a multi-chaptered fanfic, and various illustration and one-panel comics, all set in an unique Fan Verse of which the most important character is the Hatbox Ghost.
- Fritz Fraundorf's Massive Multiplayer Crossover comedy writings, borrowing from every Role-Playing Game he's ever played.
- Eric "Erico" Lawson's Legacy of Metal consists of over a million words of Mega Man and Mega Man X fanfic spanning nearly two centuries of history (2039-2222). Much of it expands on the plot points of Rockman: the Robot War in Broad Strokes as well. The author has posted a timeline and retrospective descriptions of each fic (scroll down).
- All of the works within the Warcraft fandom by Weiila take place in the same universe.
- Xanrivash on fanfiction has created a fanverse for Kingdom Hearts that gives the Organization members larger backstories and fleshed-out personalities.
- Thanks to the fact that the canon characters are largely skeleton characters made of tropes specifically to give the fan fic writers more latitude, Touhou largely relies upon a collective subconscious understanding of what each character is, with each fan fic author slighly altering the character more in line with their own tastes (such as a violently self-centered Reimu to a just plain ambivalent Reimu), but relying upon the same tacitly agreed-upon traits. A few have proper names and are based on popular or highly-exposed fanwork; these include Walfas's math-joke-heavy Flash cartoons and the action/parody Advent Cirno. There is a minor, infamous (at least on Pooshlmer) 'verse called the 'Soak.
- Fan verses are extremely common in Mass Effect fandom, to the point where most fanwriters have their own verse, usually revolving around their particular Shepard. See also the Cerberus Daily News forum where fan characters interact and RP with each other whilst still existing in the confines of the canon.
- As the game Oolite is itself a Fan Remake of the classic Elite, its Expanded Universe is basically a Fan Verse for that game by proxy.
- Immortality Protocol Cy Fox is a fanfic-verse derived from Sonic the Hedgehog which takes place Exty Years from Now in what is perceived to be our reality (minus the obvious creation of the Sonic games in the 1990s)
- The Pokéumans series has been successful to build an entire community on the website with literally hundreds of members. They have admins, group contests, special events and even annual awards.
- Final Fantasy RPG was a collaborative verse set in a world based on Final Fantasy I, IV and VI, and shared continuity with Nu RPG, a massively multiplayer crossover verse set in a world based on Chrono Trigger.
- Feynite of Dragon Age fandom has two fan verses based off of two large multi-chaptered stories, The Dread Wolf's Heart (complete) and Looking Glass (WIP). Definitely qualifies, with fanon, fanart and Recursive Fanfiction abundant on their Tumblr and Archive of Our Own account, and perhaps unsurprisingly, crossovers. Potentially widens to three fan verses with their modern-day Alternate Universe stories, or just one massive multiverse.
- Dragons Unite is an saga of many stories and accompanying pictures, based on Spyro the Dragon but set on Earth and expanded way beyond the game's original lore, and occasionally intentionally contradicting is. It might as well be called Anthropomorphic Dragons On Earth - the 'Verse at this point.
- The Skyhold Academy Yearbook series is growing into one of these, with multiple stories and even in-universe fanfic penned by two of the original characters in the series. Because it's a Bat Family Crossover for Dragon Age, it can't help being an enormous project, and the authors admit that even they aren't sure just how big of a verse it's going to ultimately be.
- There are several fanfics by the same author with Terinu set in the period prior to the canon storyline, set just after the Varn Dominion's conquest of the Earth, one set in Vulpine Prime's past just prior to their conquest by the Dominion, and a notable crossover with the Season Five Stargate SG-1 team. At least a couple of fanfics by other authors have crossed over OC's, and a couple of bits of Fanon were incorporated into the main storyline by author Peta Hewitt.
- The Homestuck fandom has a few. For instance, there's the TROLL!COPS AU, which puts the characters in a Cop Show-like modern setting. Or the Population series — where the twelve trolls settle down on Earth after the canon plot is over. The stories tell about how the trolls and their numerous progeny try to integrate themselves into Earth society, have wacky interpersonal hijinx, and lots and lots of sex.
- Inonibird's Metal Gear Solid 3 universe from The Cobra Days became so popular that other fans started writing in the same universe. Some notable fics to come out of it include "Strange Wind" and Ryuichifox's art and writings about the Fear and the Fury.
- The Whateley Universe, being a web-based fiction universe, makes this easier. On the website, there is a place for Fan Fic, and there are like 20 different authors writing additions to the Whateley world, most of the taking place (sooner or later) at Superhero School Whateley Academy.
- That Guy with the Glasses fandom tends to be, strangely, a breeding ground for this (and they're mostly Dark Fic for some reason). There's That Guy With The Glasses In Space, Escargoancitizen And Friends, a verse where Linkara is a Vampire Hunter, a Victorian AU, a Hooker!Verse, a verse for their genderswapped doubles, a Hypno!Verse where Insano has brainwashed everyone and an AU where Linkara has snapped because of a creepy obsession with Spoony.
- Cumberholmes is a fanverse based on a group of roleplayers on Twitter, and their interpretation of the characters.
- In general, all of the fanfiction written for a particular genre by Michael2 takes place in the same Fan Verse, e.g., all of the Sliders fanfiction written by Michael 2 is in the same Fan Verse.
- Fan Author Allronix usually keeps a single continuity per fandom, meaning most of her stories for a given universe will tie together.
- Anthony Bault took up the reins of a (relatively) well-known Fan Verse called Arcadia. It's loosely based off the "Captain N: The Game Master" theory, that all the game universes (Sonic The Hedgehog, Super Mario, Legend of Zelda, he's even crammed in every single anime he's ever watched into an "Ani-Earth") are connected. His work can be found here.
- The Sanza Salazar trilogy, a series of Teen Titans fics branching off from the end of season four which explore the identity of the thief Red X, whose identity went unrevealed in the original series. The second fic of the trilogy is a Fix Fic in which Terra is revived under different circumstances than in the original series finale "Things Change", while the third re-envisions the fifth season that the trilogy itself disregards.
- The Sanza Salazar series is now getting a fourth installment taking place shortly after the third and written by an entirely different author than the original trilogy.
- The so-called LegendVerse, also in the Teen Titans fandom, has existed since the end of the first season and has been added to by more than half a dozen writers, though only the originator consistently contributes to it at this point.
- Daria fanfic has expanded outwards into what's actually known as the ' Daria Expanded Universe ', with such fandom-created characters as Lynn Cullen, Jim Vitale, Pat Hackney VII, Richard Rawlings, Steve the security guard, Julia Carlyle, Michael Fulton, Alfred Phelps, Veronica Morgendorffer and Col. Kyle Armalin (and that's just a partial listing) of Daria Expanded Universe original characters freely interacting with the canon characters. (Daria fans know these folks as if they had been on the show itself.) On the fandom's Wiki, there's actually a listing for the ' Daria Multiverse ', and many of the original characters have Wiki entries and histories as fully fleshed-out as the canon characters.
- An impressive collaborative series was written for the Gargoyles series. What was notable about this was it based its story arcs on Word of God information about the future of the cartoon series, had it not been canceled. It included three "seasons" for the main Gargoyles stories, but also branched out with Brooklyn's time travel stories, the adventures of King Arthur and the London clan, and the story of the Scotland clan before its destruction.
- The Arthur Goes Fourth fan-verse. Yes, an Arthur fanverse. It has two spin-offs, each set in a different grade.
- MASK has seperate fanverses active on Fanfiction.net, the M.A.S.K Legacy series co-authored by Darster and Lisa J which is packed with original characters and crossovers with G.I Joe, and a universe shared by authors Zarius and Miratete, which attempts to be a little closer in spirit to the original cartoon, whilst still finding room for more adult subject matter
- Transformers Animated has three prominent authors who influence each other and built their own FanVerses by bouncing off their ideas. There are a ton of minor universes they write about, and they seem to have a blatant disregard for canon, so avoid if that doesn't work for you.
- The Chip 'n Dale Rescue Rangers fandom has a couple of its own, started as a continuous series of Fan Fic and often picked up by other authors than the original one. The first one was the series The Adventures Of Gadget Hackwrench which, after the success of the epic hallmark Rhyme and Reason, encouraged Rangerphiles to start writing and sort of launched the Ranger fandom's rich Fan Fic tradition. The most famous example, however, is The Nowakverse. Others are, for instance, Chip Noir Dale's Rescue Rangers or The Midnightverse.
- In the early days of the Sonic the Hedgehog cartoons (specifically Sonic SatAM), several Big Name Fans, such as Bookshire Draftwood and Dan Drazen, did this. In fact, they did it in such a way that their own verses could theoretically fit into each other's with little difficulty. These Fan Verses got so large and popular that dozens of other writers over the years contributed with episodic stories that could also slip right in, culminating in a pretty massive web with hundreds of connected stories.
- Fallout: Equestria, a My Little Pony: Friendship Is Magic crossover with Fallout. To put this in perspective, the original story alone is, at 608,000 words, nearly fifty thousand words longer than War and Peace, and the Recursive Fanfiction Fallout: Equestria - Project Horizons (which has in turn spawned its own recursive fics) has over a million words.
- RainbowDoubleDash's Lunaverse is another My Little Pony: Friendship is Magic Fanverse. A collaborative effort, it has already finished a "season" and a "movie", and is now working on Season 2.
- The Lunaverse in turn inspired The Cadanceverse, another collaborative alternate universe created by one of the Lunaverse's top contributors.
- The Piratesverse, a series of fics that serve as a continuation of The Pirates! In an Adventure with Scientists!.
- The Starlight Series, a series of fanfics crossing Lilo & Stitch: The Series with Star Trek and Cardcaptor Sakura.
- Gravity Falls seems to be a magnet for fan-made alternate universes:
- Transcendence AU is a verse that sprung up overnight and is currently growing exponentially. In it, Dipper ends getting possessed as a last-ditch effort by a dying Bill Cipher, and although Dipper is able to fight Bill off and kill him, he fused with the leftovers and became a demon, albeit one with an unusually strong connection to the physical world and no upper cap on his power level. It also caused Gravity Falls' weirdness to spread out over the world in an event known as the Transcendence. Dipper's demonic upgrade makes him immortal, and he spends the next several million years trying to hold onto his humanity and watching over the descendants and reincarnations of his loved ones, until his suicide after the heat death of the universe. It's a bit unusual in that there's no central fic. There's a blog, and the mods of the blog are the authorities on what is or isn't canon for the verse (particularly Mod Z, or Zilleniose on Tumblr), but in general the verse's canon is pretty loose and open to contribution from anyone, which is probably one of the reasons why it's growing at the frankly astounding rate that it is. Seriously, there are several new pages of content every day.
- Reverse Falls AU, in which Gideon Gleeful and Pacifica Northwest are the heroes and Dipper and Mabel Pines are the villains (with Bill Cipher as their wimpy bound demon servant).
- Monster Falls, in which the people of Gravity Falls are some way or another (usually by Bill Cipher's influence) turned into various monsters: Dipper is usually a deer-centaur or faun (also known as "Deerper"), Mabel is either a mermaid or a unicorn-centaur, Grunkle Stan is a gargoyle, Wendy is a werewolf, and so on.
- Relativity Falls, an age-swap fan 'verse in which young Stanley and Stanford Pines spend the summer with their "Grauntie Mabel" investigating the weird goings-on in Gravity Falls with a teenage Manly Dan and handy-woman Maria Ramirez (Soos's grandmother).
- Sailorleo's Reunion Falls, in which Dipper and Mabel were Separated at Birth, and Mabel comes to Gravity Falls to meet her long-lost twin. Other notable features of this AU include an increased role for Grenda and Candy, and some Mabel x Pacifica shipping.
- In the Star vs. the Forces of Evil fandom, the Ship-to-Ship Combat that sprung up in the aftermath of "Bon Bon the Birthday Clown" inspired the Ship War AU (AKA "Diaz Half-Siblings"), inspired by this fan comic where Star and Marco's Kid from the Future butts heads with Jackie and Marco's kid from an alternate future over which mother will be the one with whom their father ends up.