I'd still say Pixar should try to make a film of the the Lion Bou Triology but the other two fiction stories I know Pixar would have an easy time forming, is I know Pixar hasn't yet done a movie that takes you to the tropical lands and the two stories I've discover would both take people to damp lands.
The Nocturnals has three books a vixen is friends with a sugar glider and a Pangolin but she also knows and coyote pack leader, this story from the species the author included are Kiwi birds, crocodiles, raccoons, jerboas, wombats, bats, a spider, a Tuatara, and a few other animals.But Pixar might want to change the adventure just a tad because this is like you're in Africa, Australia, New Guinea, South America, And small sections of Asia if you know the actual locations of these species. But besides actual location this is a fun book triology. It's written by Tracy Hecht.
The other story I don't doubt Pixar's fine work of forming into a movie at all because it would be a tad like putting Mowgli and Merida into the same tale, What Elephants Know is the book's title. It's a fiction book of Nepal. A boy raised wow this time by surprise raised by a dhole pack instead of wolves, but then is taken to a king's stables which has elephants. However this boy misses his dhole family, and it's the Jungle Book he finds at school that conforts him because he feels like the story is about him. Near the end of the story the Dhole Pack also makes a discovery, and this is a chapter book with 5 parts. But Also like Merida this boy's busy trying to save his family and community after the King's stables are closed. His name is Nandu. The kids in this story of Nepal study facts of their borderlands.
If Pixar doesn't do more Princess Merida stuff, I'd at least form films of the cool fiction tales like these fiction stories for sure. I believe The Nocturnals book triology formed into a movie would likely entertain people like The Fox And The Hound did itself, and I think What Elephants Know is one of the tales more worthy of video.