Godzilla Earth is not a fanfic. It has its own official production and creative process, distinct from fan-created works. It's a legitimate entry in the Godzilla canon.
I recommend Godzilla 2: King of Monsters to you. The plot is about aliens attacking and threatening Earth. At the same time, Godzilla fights with other giant monsters like Mosla, Ratton, and Kidora. In the end, Godzilla helps humans find little Godzilla and defeat the aliens with the other monsters. I hope you like this fairy's recommendation. Muah ~😗
For developing the plot, you could introduce a new, powerful enemy that neither Godzilla Earth nor the existing characters in the crossover world can defeat alone. So, they have to combine their strengths, like Godzilla Earth's raw power and the other characters' strategic thinking. As they fight together, they also face internal conflicts within their newfound alliance. Some may not trust Godzilla Earth completely, and this mistrust can create interesting sub - plots and character development. Eventually, through a series of events and battles, they overcome their differences and defeat the enemy. This could also lead to a changed world view for all the characters involved, and perhaps a new status quo for the fictional world.
One idea could be that Godzilla Earth teams up with a group of humans who have developed advanced technology to fight off an alien invasion. The humans initially fear Godzilla but soon realize they need his power.
One characteristic is that they often have a strong environmental theme. This could be about climate change, deforestation, or pollution. Another is that they might use fictional settings to highlight real - world environmental problems. For instance, a story set in a future where the oceans are dead can be very impactful.
You can try some popular fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fanfictions including those related to Godzilla Earth.
I recommend "The Last Cultivator on Earth". The protagonist of this novel not only sealed a passage to save the Earth, but also went to the Ming River to extradite his master, explore the lost past of the Nine Realms, and walk a path that defies the heavens. This novel combined elements of fantasy and oriental fantasy. It was very interesting and attractive. I hope you like my recommendation. Muah ~
One key element is the shared passion for the earth. Tomak and his partner must both care deeply about environmental issues. Another is the actions they take together to save the earth, like conservation efforts. And of course, the love that develops between them as they work side by side.
Tomak was an ordinary man. One day, he met a girl named Lily. They both were deeply concerned about the earth's worsening environment. As they worked together on various environmental protection projects, love grew between them. Their love was like a strong force that drove them to save the earth even more. They planted trees everywhere, and their love story inspired many others to join in saving the earth.