This is an idea that's been in my head for years. I'm just waiting for the right moment to actually start working on it. School, other real-life matters, and my current fics are quite a nasty combo in impeding my progress.
I already mentioned this idea before in another thread (can't figure out which), but this is my take on the classic coming-of-age fanfic, inspired by the Sharptooth Valley fic I've heard about but not read yet, the Planet of the Apes reboot trilogy, a little of the Jurassic World trilogy, and (believe it or not) the current state of American politics. A devastating drought forces many herds to migrate to the Great Valley, which is now one of the few areas in the world that are not as affected. Following these herds are many, many Sharpteeth that can no longer survive by just randomly roaming around the lands in search of prey.
Because of this, the Great Wall surrounding the Valley is now encircled by hungry, starving Sharpteeth, who now realize all they have to do to get food is wait for more herds to migrate to the Valley and pick off any stragglers or weaklings. These Sharpteeth form a gigantic "super-pack" of sorts that calls the area directly surrounding the Valley their home. This pack enters into an uneasy truce with the Valley residents, who use Chomper as their mediator and translator, and both the herds and the "super-pack" are forced to coexist.
As a result of this new society that emerges, the Valley residents fracture into two sides: one knows they cannot control their circumstances and allows the Sharpteeth to stay for the moment, while the other is paranoid about the Valley's chances of survival and wishes to eradicate the Sharpteeth. There is an underlying tension between both sides that threatens to boil over with every passing year. The same dilemma goes for the "super-pack" behind the Great Wall: most Sharpteeth are absolutely hungry and want to storm the Valley to get more food than they could possibly imagine, while some, led by the super-pack's alpha, are more patient and believe in a delicate circle of life that they must adhere to.
The years pass and the world recovers from the drought, but the Sharpteeth's numbers have grown and they are comfortable with their living arrangements. At the same time, Chomper has grown up with the rest of the gang and begins to suffer an identity crisis, wondering if he should stay loyal to the Valley that took him in and looked to him as one of its own, or to the Sharpteeth that he has grown close to during his years of mediating, dinosaurs that are of his own kind.
One day, things finally reach a boiling point.
At least, that's the story I've come up with. Now that I've set it up here, I REALLY want to write it, but I can't write more than two or three fics at the same time even if my life depended on it.