My thoughts, they would do animal dlcs of areas that have only had builds or don’t need builds
1. South western USA: a Wild West theme has been brought up and this could give the desert animals of the 4 corners and Mexico a chance.
2. A SA animal dlc that can cover ranges from the Andes to the Amazon as plenty of requests from both areas and can cover remaining bases for SA including the Andean Bear and monkeys. Plus it would be a great opportunity to include hummingbirds, I would been very mad if they got lazy and decided to include another sloth as WE.
3. Europe I think can always get covered with other dlcs. Think Middle East, northern Asia, North America, taiga, temperate.
4. Africa. While there are some African animals I still want, I do not want another dlc exclusive to Africa after arid.
5. Asia. Northern Asia/Himalayas could use either animal or build dlc. Would be a great opportunity to make koi ponds as a WE.
6. India has good builds, an animal dlc would be nice to get blackbucks and other missing animals.
7. Australia. I think animals can still be welcomed alongside other animals in a biome or random dlc.