Imagining if these discussion boards were around when Tokyo DisneySea was being built with Indy:
"But, but, the park has Sea in the name! There's nothing relating to the seas in the Indiana Jones Adventure!"
"Well, we could say it's in a river valley near the seas."
"Bah! You're tweaking it beyond recognition now!"
"It will look great!"
"It doesn't matter if it looks great, it's breaking the theme!"
"The real theme of the park is exploration and adventure, not literally 'oceans' ."
Replace exploration & adventure with the nature > man and oceans with animals, and there you go.