Like, I get dinosaurs are also going to be in there, But maybe we can add some mammal like reptiles in there too? Maybe some ice age creatures as well for a change on Jurassic world evolution 2?
Permian seems like a possibility, depends a little on if Dimetrodon is a proper animal in Dominion like rumoured, opening the gates to other Permian "Reptiles". If it isn't it might end up as an animal from the final DLC.
As to younger, I'm unsure, fur in particular seems like something Frontier is avoiding for JWE2 when they can, making a custom Dimorphodon.
While i can agree for the possibility for the permian, i wonder if they will add the facture on mosas killing eachother since techicinally they are likely territorial even with eachother.