Yeah is looking like we are not going to complete ZT1 and 2 rosters.
Depends on how many DLCs are left what their theme is. Secretary, gerenuk, Nile croc, olive baboon and serval (even massai giraffe) i can see fitting in one pack. All savanah animals. Musk ox, walrus and sea otter could make up for a Tundra pack. Guess you can throw the rockhopper penguin in there. Mountains /Taiga could give us spectacled bear, markhor and gelada (i don't think ethiopian wolf has a chance at all). Japanese serow and Big horn sheep i see as less likely but not impossible, specially the first one. Honey badger and blackbuck in a dedicated India pack but that seems very unlikely after the Eurasia pack. Honey badger could get in an savanah/scrublands pack as well i guess. ABB is likely to come un a Boreal/Forests pack or as anniversary.
Crested gibbon, javan rhino, leatherback sea turtle, green sea turtle, iberian lynx... Have no chance.