I've been wondering if there will be new types of animals in different biomes, with deer in the forest, crocodiles in the swamps, shark on the slope of fishtopia, mountain lion, vacant oxen and wild horses, crows in the lands infected by abominations, like those in Resident Evil 3 - Extinction. 

I like the idea of being able to deal with different types of creatures, as this shows how alive the game's universe is and it would be cool to be able to capture wild horses and tame them like in Zelda or to be able to fish different types of fish with the chance of coming across rare creatures.