I can see this lineup, but I'd switch out the Markhor for the Arctic Hare. That also puts in one rig that's completely unique from what we have in the game. - Walrus and Sea Otter are going to be new rigs I'm sure but as animals they're similar to animals in the game already. The Wolverine and Muskox don't have anything like them in the game but at the same time they are taxonomically similar to other animals in the game.They've been sticking mostly to sub-regions for the biome packs this year(aside from the Sloth in the Tropical Pack) I think with this pack, it will be Taiga/Tundra focusing on North America and Eurasia.
Wolverine
Markhor
Muskox
Walrus
ABB
Sea Otter
Mule Deer
(Walkthrough exibit)small rodents and other animals[multiple species like they gave us the butterflies last year]Arctic Hare, Snowshoe hare, Alpine Marmot, Norway Lemming and Red Squirrel.
I realize they're not the biggest or most common zoo animal group, but getting one lagomorph would be fantastic, and honestly the Arctic Hare makes the most sense to me in that it distances itself from domestic rabbits further than other rabbit species. That is to say that wild European Rabbits and Cottential Rabbits look very similar to domestic species.
Edit to add, as a general comment not just to you directly. adding in the ABB makes sense if it's some kind of Tundra pack. We didn't get a bear for the anniversary which I was expecting either that or a pig-type animal. So we've still not had a new bear in almost 3 years. If it's a mountains pack, Spectacled Bear. If it's Eurasia - EBB, if it's Tundra , ABB for sure.