Title: Godzilla X Gamera X Gyaos: Giant Monster Wars
Setting: Takes place five years after Gamera 3
and three years after GMK
My drafted plot:
After Gamera seemingly ridded the world of the Gyaos at the cliffhanger of Gamera 3, a lone specimen would escape/flee to an unknown island, to grow and evolve into something far stronger than before.
Barugon and Jiger would the first evil Kaiju to appear and attack, in Odaiba.
Gamera, Varan and Anguirus would awaken in response to this new attack.
Zilla Junior would arrive just then, to help Gamera battle against Barugon and Jiger.
Baragon and Mothra would be reborn, but while Ghidorah regenerates, a colony of microscopic Precambrian crustaceans would enter his body and eventually take control of such.
Godzilla would this time be possessed a different single familiar spirit, one that would be revealed later on.
At first, when Godzilla and Gamera meet for the first time, they mistake each other for a threat and eventually fight.
Viras, Guiron and Zigra would appear, but Varan, Anguirus, Baragon and Mothra then engage in.
When Ghidorah finally returns, he's longer a Guardian Monster, as he suddenly reek even more havoc than even Gyaos and Godzilla ever did before, and is somehow absorbing all nearby oxygen.
The last Gyaos would reappear, in a form more powerful than Super or Hyper Gyaos, a form known as Ultra Gyaos.
Afterwards, Godzilla and Gamera would choose to set their differences aside and team up, not only with each other but also with the other Guardians, to battle against the real threats.
The final battle would take place in Shikoku, between Godzilla, Gamera, Varan, Anguirus, Baragon, Mothra, and Zilla Junior, against Possessed Ghidorah, Barugon, Ultra Gyaos, Viras, Guiron, Jiger, and Zigra.
Jiger would be the first to be defeated, as Mothra distracts and blinds it, Anguirus would crush and impale Jiger in his "spike ball form".
Next to be defeated is Barugon, as he nearly strangles and freezes Baragon with his tongue, Varan would stab the giant reptile in the head.
Guiron would his blade stuck in the cliff before ending up decapitated by Godzilla atomic fire breath.
Viras and Zigra would both get blazed alive by Zilla Junior.
Godzilla would slay Ultra Gyaos by firing his atomic breath into the giant bat's mouth a la Gareth Edwards 2014 reboot.
Godzilla, Gamera and Zilla Junior would unite their breaths of fire at the still possessed Ghidorah and eventually destroy him, or so they think. As Ghidorah's flesh gets peeled and burnt away, the crustaceans would fuse together to take on a new form, Destoroyah...
Destoroyah would reveal his intent on absorbing all the oxygen left on Earth to survive and become even more stronger. As he already became too powerful even for all seven Guardians, Godzilla and Gamera would choose to sacrifice themselves to defeat him, by combining their spirits and imploding their bodies. They succeed, as Destoroyah ends up turning into a statue of solid oxygen that evenutally crumbles and disintregrates, restoring the air to Earth.
In a surprise twist, not only would Gamera's spirit still live on, but also the spirit that brought Godzilla back this time, revealed to be Dr. Serizawa, who turnt out to be bent on destroying what he unintentionally created with his Oxygen Destroyer. Because he did just that in the form of the monster he once killed with that device, his soul's finally at rest as he ascends to Heaven.
In the end, the victorious surving Kaiju; Varan, Anguirus, Baragon, Mothra and Zilla Junior bid farewell to the humans as they travel to the ocean and the horizon. And just when we think that Godzilla and Gamera are really gone for good, two large different eggs wash ashore. Hinting that maybe, just maybe, they'll return...
That's my idea, what do you think of it? Please post down your thoughts, opinions, and ideas in the comments below. Thank you.