I personally expect random
.
After thinking a bit Cenozoic Pack sounds a little to ambitious for our Company. So much new animations required for one pack? Even taking into account possiblity of borrowing few animations from PZ there is still need for many new ones especially interactions between mammals and dinosaurs. This wouldn't be company I know lol.
Unironically dinosaur - mammal interaction are the only thing frontier would need to do from zero lol.
Let's say the pack is meg, smilodon, mammoth and random animal, in terms of rig and animation:
Meg could reuse dunk model and some animations, needing just minor ajustements
Smilodon and mammoth could literally just be our good and old pz lion and elephant's with a new set of coats, given all the animations such as eating, drinking, sleeping, etc, could be used for jwe
The biggest problem is this unknow fourth member that could be literally anything:
If it is elasmotherium, wooly rhino, megaloceros or some prehistoric carnivore such as cave bear, it would be the same as the other two mammals
If it is desmodus, terror bird, moa or dodo, then they would need to make brand new animations and make major model changes.
And then if it's megatherium, paraceratherium, barinasuchus or rhaast eagle they indeed would need to do brand new models and animations from zero, which basically means same effort as notho or archelon.
Also keep in mind that the last pack was "we finish porting all the hybrids and also added a sinoceratops that can eat fishes" we might indeed get a higher effort pack this time, so yeah.
Edit: i just discovered that the PZ orangutan fur is on JWE2 files, so yeah, cenozoic pack with meg, smilodon, wooly mammoth and gigantopithecus is pretty much confirmed lol.