History Main / ContinuityOverlap

* ''Manga/''Manga/XxxHolic'':

** Watanuki is often represented by Foxes and/or birds. However, he selects the bird to be his signature, which is representative of his connection to [[Manga/TsubasaReservoirChronicle Tsubasa]], as well as his being Yuuko's successor (because birds can go farther than butterflies).'' and ''Manga/TsubasaReservoirChronicle'' both merge at numerous times, and characters in one series are often seen in another. The anime for both series, due to unfortunate copyright issues, don't cross over as much.

* ''Manga/* ''Manga/XxxHolic'':

[[folder:Anime & Manga]]

[[folder:Pro Wrestling]]

[[folder:Anime and Manga]]

* ''Manga/XxxHoLiC'' and ''Manga/TsubasaReservoirChronicle'' both merge at numerous times, and characters in one series are often seen in another. The anime for both series, due to unfortunate copyright issues, don't cross over as much.

[[folder:Comics]]

[[folder:Film]]

** Nick Fury has appeared in ''Film/IronMan1'', ''Film/IronMan2'', ''Film/{{Thor}}'' and ''Film/CaptainAmericaTheFirstAvenger'', while Tony Stark made an appearance at the end of ''Film/TheIncredibleHulk''. In ''The Avengers'', the main characters from all the mentioned movies will join forces. Sadly, we're ScrewedByTheLawyers when it comes to anyone from the ''[[Film/FantasticFour Fantastic]] [[Film/FantasticFour2015 Four]]'' or ''[[Film/XMenFilmSeries X-Men]]'' films appearing, despite The Thing, Mister Fantastic, and Wolverine having been in Avengers comics for some time now and Beast having a long history with them.

* Film/TheViewAskewniverse, TheVerse in which Creator/KevinSmith has set 6 films, several comic books, and an AnimatedAdaptation.
** Several characters will be heard about in one movie, only to be seen in a later film.

[[folder:Live Action TV]]

[[folder:Professional Wrestling]]

* Film/DCExtendedUniverse:

* Behind-the-scenes pictures of some of the maintenance panels on the X-Jet in ''Film/X2XMenUnited'' reveal that some systems were built by Stark Enterprises (and that there were no user serviceable parts inside!), but they're far too small to be seen onscreen. An "Intercontinuity Nod"?

* Vanessa Kraven had never interacted with Jessicka Havok in SHINE prior to show 28 but called her out in the lead up over a year's past encounter in Wrestling/{{SHIMMER}}. Cherry Bomb was the first wrestler in SHIMMER to lose to Candice [=LeRae=] but volume 80 revealed Bomb was more upset about the collar bone [=LeRae=] had broken at a Wrestling/{{WSU}} event.[[/folder]]

** Nick Fury has appeared in ''Film/IronMan1'', ''Film/IronMan2'', ''Film/{{Thor}}'' and ''Film/CaptainAmericaTheFirstAvenger'', while Tony Stark made an appearance at the end of ''Film/TheIncredibleHulk''. In ''The Avengers'', the main characters from all the mentioned movies will join forces. Sadly, we're ScrewedByTheLawyers when it comes to anyone from the ''[[Film/FantasticFour Fantastic]] [[Film/FantasticFour2015 Four]]'' or ''Film/XMen'' films appearing, despite The Thing, Mister Fantastic, and Wolverine having been in Avengers comics for some time now and Beast having a long history with them.

* Behind-the-scenes pictures of some of the maintenance panels on the X-Jet in X2 reveal that some systems were built by Stark Enterprises (and that there were no user serviceable parts inside!), but they're far too small to be seen onscreen. An "Intercontinuity Nod"?

* All of Volition's games take place in the same continuity, where the SaintsRow series serves as a prequel to the RedFaction series, taking place TwentyMinutesIntoTheFuture. Volition no longer have the rights to the ''VideoGame/FreeSpace'' series, but a "Subach Industries" shows up in SaintsRow, referencing the Subach-Innes corporation from the former.

* All of {{Brandon Sanderson}}'s adult novels (''Literature/{{Elantris}}'', ''Literature/{{Mistborn}}'', ''Literature/{{Warbreaker}}'' and ''Literature/TheStormlightArchive'' so far, with others forthcoming) are set in the same universe, with at least one character (Hoid) appearing or being referenced in every one, and hints of a broader MythArc on the horizon.

* Valve's ''VideoGame/{{Half-Life}}'' and ''VideoGame/{{Portal}}'' videogame series canonically exist in the same universe.

** ''VideoGame/{{Half-Life 2}}: Episode 2'', for its part, introduces a ship called the Borealis as a major plot element; said ship was built by Aperture as part of an early teleportation experiment and "vanished, along with part of the dry-dock".

* Almost all of the WhateleyUniverse stories take place among a small group of kids who go to [[SuperheroSchool Whateley Academy]] together, so there's phenomenal amounts of Continuity Overlap, to the point that it looks like the authors have to coordinate character schedules down to the day.

* TheViewaskewniverse, TheVerse in which Creator/KevinSmith has set 6 films, several comic books, and an AnimatedAdaptation.

[[folder:Anime/Manga]]

* ''Series/BuffyTheVampireSlayer'' and ''Series/{{Angel}}'' interacted so much during their respective fourth and first seasons that watching them in concert is almost a necessity to understand what's going on in either.

* The SyFy Channel's played this game, with crossovers between ''Series/{{Eureka}}'', ''Series/{{Warehouse 13}}'', and ''Series/{{Alphas}}''.

[[folder:Web Comics]]
* ''Webcomic/{{Megatokyo}}'''s Junpei has shown up in ''Webcomic/{{Applegeeks}}'', and they cross over from time to time. Mostly though, they stay apart, mainly because one set of characters in in Japan and the other is in America. Plus, time passes much slower in ''Megatokyo'' than in ''Applegeeks''.
[[/folder]]

[[folder:Web Original]]
* Almost all of the WhateleyUniverse stories take place among a small group of kids who go to [[SuperheroSchool Whateley Academy]] together, so there's phenomenal amounts of Continuity Overlap, to the point that it looks like the authors have to coordinate character schedules down to the day.
[[/folder]]

** [[http://vetus.wordpress.com/nazenani/#v30 Akamatsu himself]] has confirmed that the Nitta-sensei from ''Manga/AILoveYou'' and the Nitta-sensei from ''Negima'' are the same person, as well as the fact that ''Love Hina'''s Motoko Aoyama and ''Negima'''s Eishun [[http://vetus.wordpress.com/2010/09/02/vol-31-qa-partial/ are related somehow]].

* Bryan Fuller's works -- ''Series/DeadLikeMe'', ''Series/PushingDaisies'' and ''Series/{{Wonderfalls}}'' -- are all apparently set in the same universe. PushingDaisies and {{Wonderfalls}} share a character (a one-timer) and PushingDaisies also refers to Happy Time Temp Agency, which is where George worked in DeadLikeMe.

** ''Series/{{Seinfeld}}'' also exists in this universe (Paul Buchman was the original owner of Kramer's apartment), which is weird because George's fiancee, Susan, enjoys watching ''{{Mad About You}}''.

* Similary, ''Series/{{JAG}}'' spawned ''Series/{{NCIS}}'' which spawned ''Series/NCISLosAngeles''. Other than the PoorlyDisguisedPilot, there was one minor cross-over of a JAG lawyer appearing on NCIS. Abby Sciuto is the only character on either of the three to appear on all three shows.

* When Bobby Ewing was killed off on ''Series/{{Dallas}}'', it was mentioned in SpinOff ''KnotsLanding'', and Gary Ewing named his newborn son after his late brother. After the infamous ''AllJustADream'' ResetButton that brought Bobby back, ''Knots Landing'' stopped referencing its parent show.
* The shared universe of Series/{{Arrow}} and [[Series/TheFlash2014 The Flash]] brings up a few of these. Crossovers between the shows are paired (Arrow characters show up on Flash the same week that Flash characters show up on Arrow), and as such the first crossover tends to lead into the second. There is also a notable case with Deathbolt, a VillainOfTheWeek on Arrow who was locked up in Star Labs: a later episode of Flash made heavy use of him, with no explanation of where he came from.

* ''Series/BuffyTheVampireSlayer'' and ''Series/{{Angel}}'' interacted so much during their respective fourth and first seasons that watching them in concert is almost a neccesity to understand what's going on in either.

* Bryan Fuller's works -- ''DeadLikeMe'', ''PushingDaisies'' and ''{{Wonderfalls}}'' -- are all apparently set in the same universe. PushingDaisies and {{Wonderfalls}} share a character (a one-timer) and PushingDaisies also refers to Happy Time Temp Agency, which is where George worked in DeadLikeMe.
* ''Series/{{Friends}}'', ''{{Mad About You}}'' and ''Series/CarolineInTheCity'' are all in the same universe, although they don't have a major impact on one another, just cameos by characters in each work.

* Vanessa Kraven had never interacted with Jessicka Havok in SHINE prior to show 28 but called her out in the lead up over a year's past encounter in Wrestling/{{SHIMMER}}. Cherry Bomb was the first wrestler in SHIMMER to lose to Candice [=LeRae=] but volume 80 revealed Bomb had a much more personal vendetta against her related to a Wrestling/{{WSU}} event.[[/folder]]

* Vanessa Kraven had never interacted with Jessicka Havok in SHINE prior to show 28 but called her out in the lead up over a year's past encounter in Wrestling/{{SHIMMER}}.[[/folder]]

* For most of his Wrestling/RingOfHonor career, Chris Sabin did very little in the company itself and was most significant for his feuds with Wrestling/AJStyles in Wrestling/{{N|ationalWrestlingAlliance}}WA[=-=]Wrestling/{{TNA}}. Similarly, his conspiracy with Alex Shelley against the Knights Of The Rising Dawn and boasts that they innovated the junior heavyweight style make little sense in the context of ROH itself, as it doesn't even have weight classes but makes perfect sense in the context of their Wrestling/{{New Japan|ProWrestling}} run. Despite Sabin's betrayal of them in ROH, Wrestling/ChristopherDaniels and Wrestling/FrankieKazarian hated Wrestling/TheYoungBucks more over an event two years ago in Wrestling/ProWrestlingGuerrila. In turn, most of Erik Stevens's run in Full Impact Pro would be uneventful if not for his FIP title defenses in ROH and War Machine received a shot at the GHC Heavyweight TagTeam Champions Killer Elite Squad based on their ROH exploits rather than anything they ever did in [[Wrestling/ProWrestlingNOAH NOAH]].