Here's an up to date list of all the creatures in JWE2 currently. I've listed the totals for each group, bolded the genera new for JWE2 (and listed the relevant DLC if applicable).

98 total species at the moment, 103 with the missing Dominion ones added in.

Dinosauria:

Sauropodomorpha (9 total, 2 new to JWE2):

• Alamosaurus (Late Cretaceous)

• Amargasaurus

• Apatosaurus

• Brachiosaurus

• Camarasaurus

• Diplodocus

• Dreadnoughtus

• Mamenchisaurus

• Nigersaurus

Theropoda (34 total, 8 new to JWE2; 3 missing from Dominion):

• Acrocanthosaurus

• Albertosaurus

• Allosaurus

• Archaornithomimus

• Atrociraptor (missing Dominion)

• Australovenator (Late Cretaceous)

• Baryonyx

• Carcharodontosaurus

• Carnotaurus

• Ceratosaurus

• Coelophysis

• Compsognathus

• Cryolophosaurus

• Deinonychus

• Dilophosaurus

• Gallimimus

• Giganotosaurus

• Herrerasaurus (only here for sorting convenience)

• Majungasaurus

• Megalosaurus (Deluxe)

• Metriacanthosaurus

• Monolophosaurus (Camp Cretaceous)

• Moros (missing Dominion)

• Oviraptor (missing Dominion)

• Proceratosaurus

• Pyroraptor (Dominion BioSyn Expansion)

• Qianzhousaurus

• Spinosaurus

• Struthiomimus

• Suchomimus

• Therizinosaurus (Dominion BioSyn Expansion)

• Troodon

• Tyrannosaurus

• Velociraptor

Thyreophora (13 total, 2 new to JWE2):

Stegosauria (6 total):

• Chungkingosaurus

• Gigantspinosaurus

• Huayangosaurus (Deluxe)

• Kentrosaurus

• Stegosaurus

• Wuerhosaurus (Early Cretaceous)

Ankylosauria (7 total):

• Ankylosaurus

• Crichtonsaurus

• Euoplocephalus

• Minmi (Early Cretaceous)

• Nodosaurus

• Polacanthus

• Sauropelta

Ornithopoda (10 total, 0 new to JWE2):

• Corythosaurus

• Dryosaurus

• Edmontosaurus

• Iguanodon

• Maiasaura

• Muttaburrasaurus

• Olorotitan

• Ouranosaurus

• Parasaurolophus

• Tsintaosaurus

Marginocephalia (13 total, 1 new to JWE2; 1 missing from Dominion):

Pachycephalosauria (4 total):

• Dracorex

• Homalocephale

• Pachycephalosaurus

• Stygimoloch

Ceratopsia (9 total):

• Chasmosaurus

• Microceratus (missing Dominion)

• Nasutoceratops

• Pachyrhinosaurus (Deluxe)

• Pentaceratops

• Sinoceratops

• Styracosaurus

• Torosaurus

• Triceratops

Pterosauria (10 total, all new to JWE2 except Pteranodon):

• Barbaridactylus (Late Cretaceous)

• Dimorphodon

• Cearadactylus

• Dsungaripterus (Early Cretaceous)

• Geosternbergia (Deluxe)

• Maaradactylus

• Pteranodon

• Queztalcoatlus (Dominion BioSyn Expansion)

• Tapejara

• Tropeognathus

Marine reptiles (9 total, all new to JWE2):

Ichthyosauria:

• Ichthyosaurus

Plesiosauria:

• Attenborosaurus (Deluxe)

• Elasmosaurus

• Kronosaurus (Early Cretaceous)

• Liopleurodon

• Plesiosaurus

• Styxosaurus (Late Cretaceous)

Mosasauroidea:

• Mosasaurus

• Tylosaurus

Synapsida (2 total, all new to JWE2; 1 missing from Dominion):

• Dimetrodon

• Lystrosaurus (missing Dominion)

I think it would be nice to see more ceratopsians (such as Centrosaurus, Diabloceratops, Einiosaurus, Psittacosaurus, Protoceratops, Regaliceratops, etc), ornithopods (Lambeosaurus, Saurolophus, Shantungosaurus, etc), early sauropodomorphs (Eoraptor, Massospondylus, Plateosaurus, etc), ichthyosaurs (Excalibosaurus, Ophthalmosaurus, Shonisaurus, Temnodontosaurus, etc), and mosasaurs (Prognathodon, Thalassotitan, etc), and possibly more synapsids (Edaphosaurus, Estemmenosuchus, Inostrancevia, Placerias, etc), as these are the groups currently lacking. And of course I'd like to see some more theropods too such as Concavenator (FK design), Deinocheirus, Masiakasaurus, Microraptor, Mononykus (FK design), Tarbosaurus, Teratophoneus (FK design), Torvosaurus, Utahraptor, Yutyrannus, etc.