One possible plotline could be the RWBY characters' reactions to the dinosaurs in Jurassic World. They might be amazed, scared or even try to fight the dinosaurs depending on their personalities.
I'm not sure of specific 'rwby watch jurassic world fanfic' but you can start by looking on popular fanfic websites like Archive of Our Own. Just search for the relevant tags and you might find some interesting ones.
Maybe they could have a subconscious influence. Since the fanfiction writers are fans of the Jurassic World characters, the essence of the characters might seep into their writing. However, this is not a direct influence like the characters making decisions about the fanfiction. It's more like the general vibe or the core traits of the characters that could potentially shape the fanfiction in some small, intangible ways.
Another interesting concept is a time - travel fanfic. A character somehow gets sent back in time to the pre - historic era where the dinosaurs actually lived. They have to survive in that world and try to find a way back, while also witnessing the true nature of the dinosaurs without the modern - day park's infrastructure.
One common theme could be the adventure aspect. Just like in the original 'Jurassic World' movies, the characters in the fanfic might be going through dangerous situations while also dealing with their romantic feelings. For example, two male characters might be fighting off dinosaurs while realizing their attraction to each other.
I think Jurassic Park is more science fiction. It introduced the revolutionary idea of bringing dinosaurs back to life, which was a huge sci-fi concept at the time. Jurassic World expanded on that but didn't introduce as radical new ideas.
Owen Grady is a very popular choice. His skills with the raptors make for exciting storylines. Writers can explore his relationship with the dinosaurs further, or create new adventures for him where he has to use his unique bond with the raptors to solve problems in the park.
Iron Man is often popular. His high - tech gadgets and smart - aleck personality can add a lot of fun to the crossovers. He could probably come up with some crazy plans to deal with the dinosaurs. Also, Chris Pratt's character from Jurassic World, Owen, might be popular as he has experience dealing with the dinosaurs and could interact well with the Avengers.
One interesting crossover could be the Avengers having to deal with the dinosaurs in Jurassic World. Maybe Iron Man uses his technology to try and control the dinosaurs or Thor uses his powers to fight off the really big ones like the T - Rex. It would be a really chaotic but exciting scenario.
Another memorable OC could be a tech - savvy hacker. In the world of Jurassic World, there are a lot of high - tech systems. This OC uses their hacking skills to uncover secrets about the park's operations, such as hidden experiments or security flaws. They play a crucial role in exposing the park's darker side, all while trying to stay one step ahead of the park's security forces who see them as a threat.