The only way I think this would work would be with new skins. Probably just using the ones in the movies. T-rex and Stegosaurus The Lost World, the dinos from the petting zoo in Jurassic World, and the Battle at Big Rock Nasutoceratops. And Beta from Dominion.
Maybe a Neoteny trait/skin would be the way to go. Neoteny is baby traits staying into adulthood, for example, axolotls are just salamanders that never grew up, due to Neoteny.