A fanfiction could explore the idea of Shin Godzilla having a more sentient side. Maybe it tries to communicate with humans through some form of telepathy. The story could then revolve around the humans trying to understand what Godzilla is trying to say and if they can co - exist. For example, Godzilla might be warning about an upcoming natural disaster that only it can sense due to its connection with the earth.
Well, for a Shin Godzilla crossover fanfic, it could cross over with the Godzilla: Planet of the Monsters universe. Maybe the events in that universe lead to the emergence of Shin Godzilla in a different way. Or it could cross with the Power Rangers universe. The Rangers could use their powers and zords to fight Shin Godzilla, which would be a really cool scenario with lots of action and drama.
One interesting concept could be a crossover with other kaiju from different universes. For example, Shin Godzilla meeting Gamera. It would be a clash of two very different kaiju with their own unique abilities and characteristics.
One idea could be a story where Godzilla and King Ghidorah have to team up against an even greater threat from outer space. This would force their natural enmity aside as they realize the common danger.
One idea could be that they team up to protect their offspring from other monsters. It would show a more nurturing side of these usually fearsome creatures.
One plot idea could be that Godzilla somehow gets transported to the Star Wars universe. Maybe the Empire tries to capture and weaponize it, leading to a big showdown between the rebels and the Empire over Godzilla.
One idea could be a story where Mechagodzilla is initially built to protect the city from Godzilla, but then they discover a common enemy that forces them to team up. Maybe an alien force arrives that threatens both of them and the planet. So they have to put aside their differences and fight together.
One idea could be a story where Godzilla teams up with other kaiju from different universes to fight a new, super - powerful alien threat. This would bring in a whole new level of epic battles and interactions between the various monsters.
One idea could be a story where Godzilla teams up with other kaiju to fight a new, more powerful alien threat. This would be exciting as it shows Godzilla in a more collaborative role.
One idea could be that Godzilla, as a human, has to hide his true identity while trying to understand human emotions. He might struggle with the concept of love and friendship, which are very different from his previous existence.
One idea could be that Godzilla and Kong team up against a new, even more powerful alien monster. This would force them to put aside their differences and combine their strengths. For example, Godzilla could use his atomic breath while Kong uses his agility and strength to climb on the new monster and attack its weak points.