There could be a fanfiction where the jaegers are sent on a mission to an uncharted part of the ocean. This story might involve the pilots facing new and unknown kaiju threats. They would have to adapt quickly and use their skills in unexpected ways. Maybe they discover a new type of kaiju with unique abilities that they've never encountered before.
One interesting fanfiction could be about the backstories of the jaeger pilots. It might explore their lives before they became pilots, like their families and how they were selected. For example, a story could focus on a young pilot who had a difficult childhood but found purpose in the jaeger program.
Tumblr can be a source for Pacific Rim human jaeger fanfictions as well. There are many fanfiction writers who post their works on Tumblr. You can search for relevant tags, and often you'll find not only the fics but also fan art and discussions related to the fanfictions.
Naruto as a pilot would bring a whole new dynamic. He's used to fighting alone or with a small team in his world. In Pacific Rim, he'd have to work with a co - pilot and a whole military structure. His hot - headed nature might cause some initial friction, but his determination to protect would make him a great asset in the end.
One interesting plot could be a human and a Kaiju forming an unexpected bond. For example, a young scientist discovers a Kaiju that is different from the others, not as aggressive. They start to communicate in some way, maybe through telepathy or signs. This challenges the traditional view of Kaiju as just mindless monsters.
There's also 'Jake and the Mysterious OC'. In this fanfiction, an original character enters Jake's life and they have to work together to solve a mystery that could potentially endanger the whole Jaeger program. It has a really engaging plot.
There could be a Pacific Rim OC fanfiction where the OC is a new pilot. This pilot has a special ability like being able to sense Kaiju movements from a greater distance than normal. The story could revolve around their journey of proving themselves in the face of skepticism from other pilots and commanders in the Shatterdome.
One idea could be that the RWBY characters are Jaeger pilots. Ruby could use her speed and Crescent Rose in the cockpit to fight Kaiju. Another is to have Grimm as a new type of threat in the Pacific Rim universe, and the teams have to adapt their fighting styles.
One idea could be a crossover with the Transformers universe. Picture Jaegers and Transformers teaming up to fight a common enemy. Another could be a crossover with the Godzilla franchise, where the Jaegers have to deal with Godzilla while also facing their usual Kaiju threats. A third idea might be a crossover with the Star Wars universe, perhaps with Jaegers having some sort of technology exchange with the droids or the Jedi using their powers in the context of the Pacific Rim battles.
The strong bonds between the Jaeger pilots. They come from different backgrounds but work together, like Mako and Raleigh. Their trust and friendship in the face of the Kaiju threat is a great part of the good human story.
Naruto himself would be a great choice. His ability to quickly adapt and his large chakra reserves could be useful in powering and controlling a Jaeger. Also, his experience in combat situations would give him an edge.
One idea could be an OC who is a brilliant but unorthodox engineer. They come up with new Jaeger designs that are initially scoffed at but prove crucial in a battle. For example, a Jaeger with the ability to split into multiple smaller units for more flexible combat.