What would you say the theme of Animal Kingdom is? Is it just animals? No, we have already established it's more than just another zoo. It's a park that builds an appreciation of the natural world around us with an interest in telling their stories (both fictional and real) and to build an interest in conservation and preservation. While Indy is not a treehugger or an animal rights activist, neither is most of Animal Kingdom...and it's not the intention to indoctrinate visitors with either viewpoint. It is to build appreciation, to educate, and to implant a desire in guests to preserve these treasures found all around the earth. We are taught, not just to appreciate the animal or the tree, but also its habitat, its attributes, and (when applicable) it's culture. Humans are included in the animal kingdom. Just as there is interest in long lost animals such as the dinosaurs, there is room for appreciating humans of the past along with their culture and attributes. This is what Indiana Jones embodies, the quest for artifacts from ancient cultures with the intent to preserve them in a museum and to educate others about them. Am I the only one who sees it this way?Jungles, forests, savannahs, ancient ruins are not a theme...they are a place. They exist as a setting to tell a story related to the theme. When you are exploring ideas like the conservation of nature, obviously nature and animals will take a front seat in the story. And that is why Pandora works both thematically and is visually cohesive.
Visually Indy is almost a perfect fit (if you are considering existing Disney IPs). That for me is not enough.