History WhatCouldHaveBeen / Godzilla

** Biollante was completed (several other kaiju were considered, including Battra, Super Mechagodzilla, and Titanosaurus, but Biollante was the only one that was actually ''completed'') and to be playable, but was removed from the console versions due to Pipeworks not getting the green light from Toho (In 2014, though, hackers utilizing the [=PCSX2=] emulator (a PlayStation 2 emulator for PC) actually managed to unlock her data, revealing that her entire moveset was recycled for ''Unleashed'').

** Another idea made during the conceptualization of Godzilla vs Barubaroi (which became ''Godzilla vs Destoroyah'') was that Godzilla would fight a genetically engineered cybernetic humanoid with a human face and skin made of Godzilla cells known as the "Biomonster", and the two monsters would perform a MutualKill. There were many other ideas as well, including one where Godzilla fought his son, one where he fought "deep-sea life", one where he fought "Super Atomic Godzilla" in Russia, and a particularly wacky one where Junior was sent into the past to battle the Godzilla of the 50s.

* A ''VERY'' psychedelic story known as "''A Space Godzilla''" (and no, not [[Film/GodzillaVsSpacegodzilla that SpaceGodzilla]]) was written in 1979 by Creator/KatsuhiroOtomo (a.k.a. - The writer and director of Manga/{{Akira}}!) and was even proposed to Toho as a possible film (allegedly to be done with Main/StopMotion!). It details about a female alien that ''resembles'' Godzilla dying of ''diabetes'' and its Alien Son (which also resembles Godzilla) traversing the universe, reuniting with its Alien Godzilla father, and ultimately becoming one with the Cosmos, all while being told in a [[FollowTheLeader style similar to]] ''Film/TwoThousandOneASpaceOdyssey''. It also involved the Alien Godzilla father fighting a large-breasted alien that threw swastika-shaped knives.

** [[http://news.livedoor.com/article/detail/13224601/ A single Japanese news article]] mentions Spacegodzilla being part of the anime trilogy's canon. However, he is ultimately one of the few Toho kaiju that is not even referenced in any way (even the Gargantua/Frankenstein were mentioned to have been considered by the author of the prequel novels), even though many highly obscure monsters that have never interacted with Godzilla before were included (including Daghara, Maguma, Dogora, creatures from ''Film/LatitudeZero'', and even ''Film/{{Gamera}}'' ended up getting a stealth reference). Whether this was simply a misreport or Spacegodzilla was considered at one time but scrapped is unknown.

** A remake of ''Film/KingKongVsGodzilla'' was planned for the Heisei Godzilla series (to coincide with Toho's 60th anniversary) but didn't happen because Turner Entertainment wouldn't let Toho use Kong without demanding expensive royalty payments. It supposedly involved Kong being turned into a cyborg before fighting Godzilla. Reportedly, Anguirus had also been considered to be in it as well. Whatever the case, the film eventually evolved into ''Film/GodzillaVsKingGhidorah''

* Like ''Film/KingKong1976'' Toho had seriously considered remaking the original film in the Seventies with the title ''King of Monsters: Rebirth of Godzilla''. Apparently however, production got delays hit before it could even start which lead to it's cancellation.

* Like ''Film/KingKong1976'' Toho had seriously considered remaking the original film in the 70s with the title ''King of Monsters: Rebirth of Godzilla''. Apparently however, production got delays hit before it could even start which lead to it's cancellation.

* Tanaka's first attempt to revive the Godzilla series after ''Destoroyah'' was a proposal titled ''Godzilla Vs Bio-Godzilla'', in which a now adult Junior would team up with the Ghost-Godzilla to fight off the titular threat. Tanaka's passing ended up leaving the proposal on the cutting room floor.

** Another version developed in the conceptualization of ''Godzilla vs Destoroyah'' was ''Godzilla vs. Giant Monster Varan'', and as the name implies, the final enemy of the Heisei series was going to be '''Varan''', as the "herald of the apocalypse".

** Another idea made during the conceptualization of Godzilla vs Barubaroi (which became ''Godzilla vs Destoroyah'') was that Godzilla would fight a genetically engineered cybernetic humanoid with a human face and skin made of Godzilla cells known as the "Biomonster", and the two monsters would perform a MutualKill. There were many other ideas as well, including one where Godzilla fought his son, one where he fought "deep-sea life", and one where he fought "Super Atomic Godzilla".

** Some concept illustrations from the art book had unused Titan designs, including several which resembled Toho kaiju such as Gigan, Kumonga (even if a giant spider-like kaiju did end up in the final film), Anguirus (even if his skeleton did end up in the film in a freeze-frame cameo), Kamacuras, Baragon and even one which looked like '''Gamera''' (even if most of these were probably just meant to be placeholders).

** Concept illustrations and statuettes indicate that portraying Rodan with bird-like feathered wings was considered before the final design of the more classic pterosaur-like wings was used (although with the addition of a molten texture to go along with his volcanic origins this time).
** Some concept illustrations from the art book had unused Titan designs, including one which strongly resembled Gigan, another which was a GiantSpider similar to Kumonga (even if a giant spider-like kaiju did end up in the final film), and one which looked like '''Gamera'''.

* A number of fans are still baffled by Anguirus burrowing about in ''Film/GodzillaVsMechagodzilla'' despite never displaying it before. Well, that's because they originally wanted to have Baragon appear instead. It was changed as Baragon's suit (once again) was not readily usable. Compare to the Gorosaurus example from ''Destroy All Monsters'' above.
** An earlier draft for the film had Godzilla, Anguirus, and Mothra teaming up to fight aliens called the Garugans. Mothra was replaced with the new King Caesar and the Garugans became the Black Hole Aliens and Mechagodzilla.

* '''[[NotMakingThisUpDisclaimer Actual film idea]]''': ''Franchise/{{Batman}} [[CoolVsAwesome Vs. Godzilla]]''. Supposedly, some of the concepts from the film were recycled in ''Son of Godzilla'' like the weather control machine. It's probably worth noting the idea came around not too long after the famous 60s ''Series/{{Batman|1966}}'' show debuted. The closest this ever came to fruition was likely the Toho film ''Film/LatitudeZero'' (which is usually considered part of the Godzilla canon-verse), which starred Cesar Romero (who played the Joker in the Batman show) as the villain, who had an army of mutant animals, which included Bat Men (and yes, that is their official name).

* Film/{{Rodan}} was originally conceptualized as a giant prehistoric bird resembling ''Archaeopteryx'' (whether this had anything to do with the scrapped ''Bride of Godzilla'''s ''Archaeopteryx is unknown) before he became a giant pterosaur instead.

* In the early 2000s, film studio [[Creator/{{Daiei}} Kadokawa-Daiei Pictures]] approached Toho with the proposal of a '''Gamera vs. Godzilla''' crossover film. In what might be one of the most unfortunate missed opportunities in monster film history, Toho rejected the offer, and Kadokawa-Daiei went on to make ''Film/GameraTheBrave'' instead.

* An early draft of what would become ''[[Film/GodzillaAndMothraTheBattleForEarth Godzilla vs. Mothra]]'', ''Godzilla vs. Gigamoth'' (involving a mutated Mothra known as Gigamoth, which probably evolved into Battra), sound INSANELY interesting.

* ''Film/KingKongVsGodzilla'' was originally conceptualized as a film where Kong would fight a giant ogre-like monster created by Dr. Frankenstein, before the script was shipped to Toho, where Frankenstein was replaced with Godzilla, and we got one of the most legendary crossover-versus movies of all time, while Frankenstein would later be used in ''Film/FrankensteinConquersTheWorld''.

** [[http://news.livedoor.com/article/detail/13224601/ A single Japanese news article]] mentions Spacegodzilla being part of the anime trilogy's canon. However, he is ultimately one of the few Toho kaiju that is not even referenced in any way (even the Gargantua/Frankenstein were mentioned to have been considered by the author of the prequel novels), even though many highly obscure monsters that have never interacted with Godzilla before were included (including Daghara, Maguma, Dogora, creatures from ''Film/LatitudeZero'', and even ''Film/{{Gamera}} ended up getting a stealth reference). Whether this was simply a misreport or Spacegodzilla was considered at one time but scrapped is unknown.

** [[https://www.youtube.com/watch?v=llhqnyDgoRo A large-scale animatronic of Godzilla's upper body]] was constructed that was semi-mobile, but it didn't end up in the final film, with every shot being a computer-generated model.

** Some early ideas for Mechagodzilla was that it would have an artificial alien life-form known as Berserk which would gradually get larger and more Godzilla-like by consuming machinery, and being comprised of seven separate vehicles which would combine to form Mechagodzilla (this version is actually what ended up being illustrated in the film's poster).