That is the thing, they won't do that because fans would actually want it and pay for it. So, instead, they will probably just do "breeds" of cats and dogs as digital DLC through Origin.
I personally would love to see what reptiles were included in this type of expansion. Since it is digital, could we seemingly have a recreation of Jurassic Park or something? That would be cool.
A dinosaur pack would be cool!
I have to agree. I would probably buy Sims 4 and a dinosaur expansion pack for Pets if they offered it. lol