I'm starting to wonder what the implications will be if we get a rainforest, islands or tropical pack. We could probably get a full animal pack of each with species from the Meta-wishlist top 50. Since this is a scenery pack, it may either mean that we get some main species from either one, and after this more species from other regions. However, a small part of me hopes that we get a generic Tropical DLC now, which leaves space for a Rainforest and Islands animal DLC in the future. I know it's wishful thinking, but at the same time it would make some sense considering that we got most temperate/boreal/tundra animals covered.
Also, if we get a walkthrough exhibit with birds, I would love the Bali mynah to be included.