A Motif Merger is a stylistic 'beat' sometimes used during a crossover. It's when both 'sides' have certain things that are their trademarks, and (during the crossover) there's a symbolic moment where the two motifs are either swapped or combined.
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Anime and Manga
- The page illustration is the logo for DC's current Superman/Batman series, Superman's shield logo inside Batman's bat logo. For example, the cover of issue 8.◊ The first arc of the series was adapted into the direct-to-video Superman/Batman: Public Enemies, mentioned below.
- The logo◊ for the Trinity series combined Superman, Batman, and Wonder Woman's symbols.
- Devils Due's G.I. Joe VS Transformers used a mash-up between the Cobra and Decepticon symbols in advertisements, but not in the actual comic (except to separate issues in the collected edition).
- Archie Meets the Punisher features The Punisher's skull-logo crossed with Archie's facial features.
- In The Dresden Files fic Restitution, Lash (a redeemed Fallen Angel) merges her hourglass sigil with an infinity sign, symbolizing her reconciliation with God.
- Undocumented Features: After becoming a Transformer, Martin Rose uses an Autobot logo superimposed over a Wedge Defense Force logo on his clothing.
Films — Animated
- In the animated DCAU crossover movie "World's Finest", the Bat-Signal (Batman's emblem) is broadcast onto the globe on top of the Daily Planet Building (Superman's).
- The exact logo at the top of the page also appears in-universe in Superman/Batman: Public Enemies on the chest of a giant robot that Toyman, Japanese wunderkind Hiro Okamura, built to destroy a Kryptonite asteroid that would hit Earth. Cut him some slack: he designed it when he was seven.
Films — Live-Action
- The movie Freddy vs. Jason had a moment of mixing icons: a slow pan down from tree level, coming down onto a sign reading "Elm Street", while the soundtrack played the Friday the 13th "ki-ki-ki-ki, ma-ma-ma-ma" leitmotif.
- Batman v Superman: Dawn of Justice: Just look at the page image, then look at the trope image. It's is the logo for DC's Superman/Batman series, albeit with more of an influence from the Superman logo from The Golden Age of Comic Books and the Batman logo from Batman: The Dark Knight Returns.
- A more literal example comes from Indiana Jones. When John Williams made two drafts for Indy's theme, one grand and regal and the other more subdued. Spielberg liked the grand one a lot and it became the iconic theme, but upon his suggestion, the subdued one was used for the middle portion.
Live Action TV
- The shows Homicide: Life on the Street and Law & Order , which had distinctive ways of sequeing from one scene to anothernote , crossed over once. During the crossover, the scenes in New York City (L&O's turf) were filmed with Homicide's transitions, and those in Baltimore (Homicide's setting) had L&O's transitions. (That is: Cut to black, glun-glung, text: "Baltimore Homicide Division, 10:30 AM.", fade in.)
- Quite common in Super Sentai teamups, with the team's logos merging. For example, Juken Sentai Gekiranger vs Engine Sentai Go-onger ends with the Geki triple-claw emblem on top of the Go-onger "G" speedometer.
- Arrowverse crossovers will often switch up the title cards and commercial-break scene wipes of the series involved. For instance, in the first two part crossover between Arrow and The Flash (2014), "Flash vs. Arrow" had one of Ollie's arrows take the place of Barry's lightning bolt, and the reverse happened in "The Brave and the Bold".
- Kamen Rider, starting with Kamen Rider Gaim, has begun exploiting the Swiss Army Hero trope so that during crossover movies and other special occasions, the Riders will gain special alternate forms that mimic the powers and appearance of other Riders.
- Sometimes two wrestlers forming a tag team will have their respective theme tunes and entrances "mashed up". Examples: Luger & Smith, the Allied Powers; Kane and Hurricane Helms as HurriKane, or the Corporate Ministry (The Undertaker's "Ministry of Darkness" and Vince McMahon's "Corporation" stables, merged) using a remix of the Corporation's theme in the style of the Ministry's theme.
- The Guilds of Ravnica all have their own sigils, that are, abstractly, combinations of the mana symbols for their colors. For example, Selesnya's symbol, combines white's sun with green's tree to make a mostly circular tree with sunbeams coming out of it, while Rakdos's is a flaming skull.
- Sonic the Hedgehog (2006): Mephiles has a sinister-sounding piano leitmotif (with a techno remix as his boss fight music). Iblis is accompanied by a bombastic, orchestral score. When the two fuse together to form the True Final Boss Solaris, the phase 1 boss music is Mephiles' leitmotif, performed by Iblis' bombastic orchestra.
- The DS version of Mario & Sonic At The Winter Olympic Games has Blizland, half of which represents Dr. Eggman's factories while the other half represents Bowser's Castle.
- In Angry Birds Star Wars, the Alliance Starbird incorporates the omnipresent slingshot that the birds use, while a pig's snout is added to the Imperial crest.
- FreeSpace 2 borrows the style for an early short video discussion backstory, showing the Galactic Terran Alliance and Parliamentary Vasudan Empire emblems merging into the Galactic Terran-Vasudan Alliance emblem. In general, the GTVA emblem counts as this trope just as much as the Union Flag does, being a combination of the symbols most representing the Terran and Vasudan peoples.
- A variant in BlazBlue: every character has a special "crest" that represents them (you can see them when they perform their Limit Break or Finishing Move). One certain character's crest is a combination of two others'. It's the Black Beast's, whose crest is a combination of Ragna and Nu-13's.
- Dragon Age: The Inquisition symbol combines the "Eye in a Sunburst" of the Seekers of Truth and the "Flaming Sword" of the Templar Order. Justified as both factions derived from the original Inquisition and apparently adopted their preferred aspect of the logo when they broke off.
- Todd in the Shadows does his "playing the reviewed song" intro whenever crossing over with other reviewers from That Guy With The Glasses. For example, he plays Film Brain's "Ready to Roll" over the BMB opening sequence, "It Wasn't Me" after he and The Rap Critic accept to review the song, and "I'm Not a Girl Not Yet a Woman" when he and The Nostalgia Chick review Crossroads (2002) (though the Chick decides to join him at the piano).
- For The Cinema Snob's crossover with Brows Held High, the Snob's theme plays over Oancitizen's opening sequence.
- Bad Movie Beatdown crossovers at times mix images of the guest reviewer in the intro, as well as a Portmantitle ("Brows Beat Down", "Shameful Sequels Beatdown", "Bad Movie Beatdown Presents").
- This is how the Meta symbol in Red vs. Blue was formed, out of the symbols of all the other AI's which are most of the Greek alphabet.
- Ask Twixie Genies: After Twilight moves into Trixie's bottle, the symbol on it shifts from Trixie's cutie mark to a subtle combination of Trixie's and Twilight's marks. This appears to be a magical feature of genie bottles; later on, when Trixie is taken from the bottle, the symbol shifts to Twilight's cutie mark.
- The crossover between Ben 10: Ultimate Alien and Generator Rex, Heroes United, had Ben 10's Omnitrix at the center of Rex's gear logo.
- Similar to the above, the crossover of The Grim Adventures of Billy & Mandy and Codename: Kids Next Door has the openings combined, making the KND operatives grow flesh from bone like the former's opening.
- In-universe example in The Simpsons, episode "In Marge We Trust": Merging the smiling fish logo of Matsamura Fishworks with the lightbulb logo of Tamaribuchi Heavy Manufacturing Concern, the two companies involved in the production of Mr. Sparkle dishwashing detergent, results in a grinning yellow head that just happens to resemble Homer's. "There's your answer, fishbulb."
- Nearly every Gem in Steven Universe has a leitmotif, and when two Fuse together, the result has a theme that has elements of both components'. This is also used to form most Fusions' Weapon of Choice. Opal, for instance, turns Pearl's spear into a bow with Amethyst's whip as the string.
- Quite common with national flags and coats of arms. The Union Jack was originally a combination of the flags of England and Scotland. Later, Ireland was added. But not Wales. Wales was invaded. The others joined peacefully by acts of their parliaments, but a few problems arose.
- The Australian Coat of Arms includes a shield divided into six with the arms of each of the states on it. Originally they developed a unique federal arms, but they subsequently developed a new set including the arms of each state, inspired by...
- Canada's royal arms of the time (around 1910), which included the arms of each province. This however was terribly cluttered; Canada had at that point nine provinces, which was deemed to be too complicated to be useful. The Canadians then adopted the first form of their modern arms by taking the British royal arms, switching the extra England quarter with royal French fleurs-de-lys, adding three maple leaves on white in the base, and having the lion and the unicorn carry flagpoles bearing the Union Jack and a blue flag with fleurs-de-lys, respectively.note
- Following Wars of the Roses, Henry VII created the Tudor Rose, which was the White Rose of the House of York within the Red Rose of the House of Lancaster, representing the merging of the two houses (His mother was of the House of Lancaster and his wife was of the House of York).