We already have a relatively clear 7 habitat animals we can gather from the dictionary:
- Hamadryas Baboon
- Markhor
- Pallas's Cat (only animal not leaked)
- Goodfellow's Tree-Kangaroo
- Short-Beaked Echidna
- Coquerel's Sifaka
- Kirk's Dik-Dik
Rather than assuming Frontier would break convention of having more than 7 habitat animals in a single DLC pack, I think the spurred tortoise will be a walkthrough exhibit animal.
I'm also assuming that "secretary" is general enough to not hint at secretary birds being added despite their overwhelming popularity (even if I'd prefer seriemas for more South American representation).