Hey Arnold!: Searching For His Origins (The Jungle Movie Fanfiction)

I know Hey Arnold! TJM has already been greenlit for production, but since it's not coming out until late next year, I figured that there was still some time left to write a fanfiction on it, under a new name to not confuse with the other fanfiction, which is simply called "The Jungle Movie".

PLOT: One night, Arnold is flipping through his father's journal when he finds a map drawn on two pages.
After winning a class trip to San Lorenzo via a nationwide essay contest, he uses the map as an
advantage to search for his lost parents, who disappeared in the San Lorenzo jungles nine years
before. However, the evil river pirate La Sombra is still lurking through the wilderness, and he will
do anything he can to destroy Arnold and his friends, and if still alive. destroy Arnold's parents.