Now knowing what the complete roster has, I feel free to suggest what dinos I would like to see. I'm going to make three list posts of Land, Air, and Marine dinos respectively with 10 for each. Not that none of the list segments aren't like "Top Ten" or something like that.
(Land)
1. Callovosaurus (Jurassic, Europe): A small ornithopod that may have been more or less like the in-game Dryosaurus, only a bit smaller. It's a dinosaur that has its name listed in some additions to the original JP novel.
2. Shantungosaurus (Cretaceous. Asia): The biggest known hadrosaur in the world. It was found within the same formation as the in-game Sinoceratops, the first described ceratopsid from Asia.
3. Hypsilophodon (Cretaceous, Europe): A small ornithopod from the UK. It was a significant small dinosaur from the original JP novel.
4. Ichthyovenator (Cretaceous, Asia): A spinosaur theropod with an unusual sail shape, something no other known spinosaur spines feature.
5. Lambeosaurus (Cretaceous, North America): A large hadrosaur from Canada. There are two known validly described species, both with unique crest shapes. My favorite is the lambei species which is known to have a checkmark-like crest shape.
6. Diaboloceratops (North America): A ceratopsian dinosaur with a narrow skull, and horns that went upward on its frill and above the eyes that give its name, "devil-horned-face".
7. Segisaurus (Jurassic, North America): A small theropod dinosaur whose only known specimen is missing its head and neck, and may have been not fully matured to adulthood. It was listed on brochures/maps for the original Jurassic Park film, just like several other in-game theropods that didn't physically appear in it.
8. Plateosaurus (Triassic, Europe): A prosauropod that walked on two legs. The generalized posture for this dino was a long debate, until in recent decades or so when it was narrowed to full on bipedality.
9. Protoceratops (Cretaceous, Asia): A sheep sized ceratopsian from Mongolia. Both eggs and skeletons of this dinosaur have been found, one of the latters which was part of an amazing discovery of both it and a Velociraptor locked in combat.
10. Udanocertops (Cretaceous, Asia): A medium sized ceratopsian with a large skull and large lower jaw. It is also the largest known species of its type.