One idea could be exploring the backstories of the characters more in - depth. For example, fleshing out how Alex became so good at gaming before the alien invasion. Another could be creating an alternate ending where the group doesn't succeed in saving the world right away, but has to embark on a second, more dangerous mission.
First, re - watch the movie to get a fresh feel for the characters, the setting, and the overall plot. Then, pick a starting point. It could be right after the movie ends, or you could go back to a key moment in the movie and rewrite it from a different perspective. For example, start from when they first see the alien ship.
Rim Runner in science fiction could be a new or relatively unknown concept. It could be related to a form of technology that is used for traversing the rim of a planet or a large celestial body. Maybe it's a vehicle or a device that has the ability to 'run' along the edge of a gravitational field or some other boundary in space. It could also be a name given to a species or a group of beings that are known for their activities around the rims of different areas in a science - fiction setting.
The story could start with Naruto being mysteriously pulled into the Pacific Rim dimension. He would be initially confused but quickly adapt. His rasengan could be modified to be used as a powerful weapon against the Kaiju. The story could explore how his ninja values of loyalty and perseverance play out in the context of the high - stakes battles in the Pacific Rim world.
The Pacific Rim science fiction often features a post - apocalyptic or pre - apocalyptic setting. It creates a world where humanity is on the verge of being wiped out by these terrifying kaiju. The design of the kaiju themselves is also a big part of it. They are not just random monsters but have unique features and abilities. The mechas, on the other hand, are not just weapons but symbols of hope for humanity. They are designed with different functions and weaponry, and the pilots have to master their use in order to defeat the kaiju.
Another back story might be that of a colonist who was part of a failed utopian experiment. Their colony was supposed to be a paradise, but due to mismanagement, internal conflicts, and external threats, it fell apart. Now, they are in the Rim World, trying to find a new place to call home and start anew.
I'm not sure if there are extremely well - known 'Rim Runner' stories specifically. There could be some indie or niche science - fiction works that use this term in their title or as a central concept, but it's not a mainstream, widely - recognized story title as far as I know.
The back stories can affect gameplay in many ways. For example, a character with a combat - related back story might start with better combat skills, which gives an advantage in defending the colony from raids. So, you don't have to spend as much time training them in combat initially.
I'm not sure specifically which 'rim jhim rim jhim 1942 love story' you are referring to. There could be a movie, a book or a local tale with such a name. Maybe it's a love story set in 1942 with some elements related to the sound 'rim jhim' which could be rain or some other rhythmic sound that plays an important part in the story.