I’m thinking either Island or Coastal Packs.

Island

If it’s a normal dlc I’m expecting Kiwi, Tree Kangaroo, Tasmanian Devil, Fairy Penguin, and either Lord Howe Stick insects or Chameleons. a cool Caribbean / Pacific style building set.

If it’s an animal pack I’m expecting Serow, Sifaka, Nene, and possibly Quokka on top of the other animals.

Coastal

If it’s a normal dlc I’m expecting rockhopper penguin, walrus, common puffin, sea otter and hermit crab. a new coastal building set, something like an English harbour, or maybe a Mediterranean like set (Italy, Greece, Tunisia etc) with bright colours.

If it’s an animal pack I’m expecting west indian manatee, green or hawksbill sea turtle, brown pelican, coconut crab and elephant seal on top of the other animals.