I think the anniversary animal may help to figure out, or at least eliminate, some winter pack possibilities.
Spectacled Bear for Anniversary animal? Probably not getting a Highlands/Alpine pack.
Wild Boar for Anniversary animal? Probably not getting something that leans heavily into Europe/Eurasia
American Black Bear, a second Flamingo, a second Giraffe or the Nile Crocodile won't really help us figure anything out, but they're also animals I think are high possibilities to get.
I am probably wrong here, but I have a very very strong feeling it's going to be one of these 6 animals.