POTM: Make the entire opening Hauro boarding the ship and Godzilla attacking, increasing it to a full on battle where Godzilla utterly devastates the defense before the ships take off and seemingly glares at Haruo as he leaves (setting up a delibrate parllel with the end of the film).
We get the background information but displayed in a MUCH more interesting way then stills and grainy news reports (maybe animating them?). Haruo is already in the brig, with the elder exploding and the history of how much the Aratum suuuuuuuuuuuuuuuuuuuuuuuuucks as dialogue. Show, don't tell; I know, but it has no real buisness here. Keep most of the stuff leading to the offical Earth voyage the same but with one exception: we offically introduce Yuko. She's still Haruo's childhood friend and sorta love but she's treated as much gruffer, because in this version, she's aged up to being like 3 years older then him. So she has experience with the kaiju attacks and humanity's failure, making her the cynic to Haruo's techincal optimsim in overthrowing Godzilla.
Instead of genius millitary shooting man, Haruo's real appeal is his optimism. He is a beliver in humanity, their power and so on. He's still a arrogant shitheel but his main thing is
insipring people to suicide themselves into Godzilla, not making them do it and them listening because he did good on space SATS or something.
Godzilla's Earth is mostly the same but with more Servum species appearing. This is 100% a world of monsters. Also, to further set up the "man's arrogance caused this" theme. it's shown destroying parts of the forest to make the base camp is the reason the Servum attack intially.
Rest goes as normal.
COTEB: The Houta's village is explictly not Godzilla. Not just some caves, but an entire area like old Earth, safe from Godzilla's influence. They're also more on the fence about killing Godzilla, saying "The Mountain is dangerous, but wars with gods do not let us win" or something like that.
Yuko, continuing on the bitter cynic thing, instead becomes feverently a believer in the nanometal, telling Haruo it's the best solution, up to the point she implictly begins to consider converting when the humans discover it, but ends up half robotcized anyway against her will.
When Mechagodzilla City is activated, one of the Bilusaldo report the head still has some limited AI. This would come back in the finale, when during Mulu suddenly says "finally, our great plan will be completed" leading to a monologue that reveals Mechagodzilla
planned this, and purposefully destroyed itself to build Mechagodzilla City, as "99.99% of all calculations confirm, willing or forced conversion is the only way Godzilla will be defeated and humanity can retake the planet". Thus expanding Mechagodzilla's role, revealing the true threat of the nanometal, and all while keeping the city.
PE: Yuko lives. She and Haruo are objectively not on good terms? She's in a deep depression of her fate and the fact that despite the horrors, she still sees destroying Mechagodzilla City as throwing out humanity's last hope. As such, when Metiphes comes a-knocking about some space spaghetii, she's
very interested.......
Instead of weird akward sex excuse, Maina and Miana tell Haruo the story of Mothra, and how she taught them how survival is winning against great terror (though Haruo considers it nothing more then a myth). They attempt to show him this though some psychic stuff but when they do, he (and us the audience) only see a black void and something golden lash out at the screen. This leads Maina to go and confront Metiphes and leads to Miana and Haruo to bond in NON intimate ways, though it's implied to be romantic.
Ghidorah and Godzilla fight, though it's slightly more intense (Ghidorah physically like snapping Godzilla's arm back when he lashes out and so on) while Hauro goes to confront Metiphes, he finds him praising with his eye amulet.....and Yuko, who is held down, crying with two amulets in her eyes.
We get the trippy memory scene in which Yuko counteracts Haruo by having fully submitted into the "everything's dying, let Ghidorah take it so we may at least go doing something good" mentality. Eventually, the Houta are able to break though and get to Haruo as he observes the nuke once again.....
He finds himself seeing his parents as a child as they tell him his name means hope and spring, before he finds himself in a garden. He looks around at flowers before notcing himself and Yuko as children playing with candles, a single butterfly dancing above their heads. Slowly, it flies off, Haruo watching as slowly, more and more appear, an entire swarm forming around themselves. Haruo covers his face as their wings become a galestorm, the vauge image of them colascing into one massive shape appearing as the sky lightens.
Ghidorah screeches and lets go of Godzilla, cackling in anger, his hold on Godzilla broken for a moment.
Martin (he's not helping the Houta with their thing, that was just weird and threw a bunch of technobabble into a spiritual scene.): "What? something made it break it's hold?"
a private tells Martin: "Sir, the radio!"
"Eh, what is it?"
"all channels. There's....
there's singing."
With Mothra ever so slightly breaking the hold, Haruo runs up to a barely concious Yuko, screaming her at to remember those days. How despite the wars, the monsters, they held on hope. They didn't let the darkness take them. As long as there's a light, there's hope. Yuko slowly, shakingly moves her hand near her face, clearly trying to take the amulets out. Metiphes intervenes but Haruo attacks him, a short tussle, that ends with him destroying his eye just as Yuko screams and gouges into her eyes.
Same ending as before. Godzilla drives off Ghidorah, Metiphes and Yuko die (with Haruo mourning his childhood friend instead of, you know, that one dude he knew for a bit who was actually a skreeonking monster. He does mourn him, just not as much), and just as Haruo is sobbing, Godzilla appears, his head piercing the cloud.
He and Haruo lock eyes on more time. Instead of screaming, crying, anything, Haruo just slowly bows his head.
"no more hatred. Just let me know. Will we live or will we die?"
Godzilla watches him for a second.
Cut to the other human's outpost. Godzilla's blast cuts though the sky.
Haruo still sits on the mountain. The beam dissipates. Godzilla gives a final stink eye then disappears in the fog.
Credits and the end credit scene but with a old Hauro and Miana watching children do effigys to Yuko, who has now become a legendary figure to fight against darkness.