I believe
@ToTBellHop implied that the Moana blue sky from D23, which some here have hypothesized to be part of a Oceania themed land alongside Nemo, will include some live animals.
Um... well while you are right that there is some thematic overlap between EPCOT and Animal Kingdom, you couldn't just pick up World Nature and plop it in the middle of DAK. There is more to Animal Kingdom than just nature/envionmentalism, as I have mentioned here before. For one, there is one key difference in the way Animal Kingdom and EPCOT approach their themes. EPCOT expects its guests to learn directly through edutainment— such as what we see in the land pavillion. Animal Kingdom however expects experiencing an adventure to change its guests' philosophies. This is one of the core tenets of Disney's Animal Kingdom, referred to by Joe Rohde as "psychological transformation through adventure." So, an EPCOT attraction would not feel at place in DAK. Even if said attraction happened to be about nature.
It's also worth noting that Animal Kingdom is more focused on animals themselves than World Nature is. I mean, sure, DAK definitely is about more than just animals, but the primary focus of the park by far is the animal kingdom— hence the parks name, its mission statement, and Joe Rohde's various instagram posts explaining the origins of the parks themes' as being derived from the basic concept of a wildlife theme park.