With the hints in mind, my final guess before tomorrow would be a tropical Islands-themed scenery pack. Obviously one of the four habitat slots will be the Fossa. If its indeed Islands, two more slots will definitely go to the Tasmanian Devil and the Kiwi (both easy to achieve and really requested species). The fourth slot is a bit more of a toss up since Frontier always likes to pull at least one random pick. My guess is it’ll be another small mammal (Frontier unfortunately isn’t gonna give us more than one habitat bird or reptile in a pack, sigh). Tree Kangaroo seems like a good fourth candidate, but if Frontier wants to take an easier-route (they very likely may) I’m guessing it’ll be an islands-based ungulate. Whether that be anoa, mouse deer, serow, etc. is anyone’s guess.
Pretty much certain it’ll be a scenery pack though because of the new SEA architectural pieces in the background of the stream.
All this said and with all we now know in mind, I’m feelin a little “mhem” about the pack if I’m honest. Not making any final statements about the DLC till its revealed in full, but with Frontier’s previous roster lineups in-mind and considering what’s likely and not likely from them, this DLC feels kind of “cookie-cutter” to their formula. Like almost all their previous scenery packs, it’ll likely come with some useful pieces, but also a fair share that are likely way too themed to be used in more practical ways. And as for the roster, it’ll be almost all, if not all, mammals - with a lean towards carnivores. Likely leaving a lot more to be desired, for me anyways.