I was on this same thought but after Arid Pack I’m not so sure. The Arid Pack had only 2 top 15 animals (I think) one of which was a clone from what we already had (camel) they must have known that those 2 alone wouldn’t be able to carry the excitement, because I think we all know the porcupine is the all time star of the pack.
Not saying the rest of the animals like the rhino or ass aren’t exciting, but they aren’t as requested as the porcupine or camel, which would get most people’s attention. Even removing the Sand Cat and replacing it with either Secretary or Baboon, both of which would only need one new animation, which they would’ve had time for if the cat was removed.
I still want to believe they’re saving them for next year, but idk with the new planet game coming it’s a toss up if support will last past summer 2024.