Frontier has been knocking off a lot of the animals at the top of the meta wishlist in the past few packs. First the Capybara in the Wetlands Animal Pack, then the Przewalski's Horse and Amur Leopard in the Conservation pack. By that logic, considering the Tasmanian Devil is at the top of the meta wishlist right now, I'd be somewhat surprised if we didn't get it in the winter DLC.
What's really weird with this pack is that neither of the top 3 animals in the meta list made it in, despite all of them fitting in with the theme. I mean, for me I would have preferred the wombat over pretty much anything so I'm personally okay with it, but it's just an odd selection when 3 more viable popular ones could have been made, one of them very close to an animal we got no less (Maned Wolf to Fox).
But anyways, yeah the flip side of that is that they chose less popular animals because there will probably be more extended support in the future. Granted they're probably not going to knock every single one of the current top 10/20 out, but I think - I hope - that we'll get most of them.
When I started this thread it was more of a concern on how not if, we get the TD, because I do think we will. While it would almost surely require a new rig, it wouldn't seem to be more of an effort than I lot of animals already in the game. By that I mean...the sloth, the tree Kangaroo, they may have issues with climbing, though I think they've likely sorted that out to an extent. The Porcupine is going to be a headache to design and animate all the quills; I'm not very tech savvy but I can't imagine it won't be...difficult.
But the Tasmanian Devil, not so much - for that matter, the Maned Wolf, Red River Hog or Emu too. I think we'll see all four of these at some point.