Wouldn't expect any more variants than what was in JWE2 for returning species, given they're making males for each variant, and maybe juveniles.
It's more likely they're just cutting Frontier variants, like the Dreadnoughtus.
In the cases of Dreadnoughtus and Gigantosaurus, I prefer the movie versions over Frontier's own pre-movie versions.
About males for each variant, I have this notion in the case of Velociraptor. The 1993 Velociraptor is certainly female, whereas the 1997 Velociraptor can be male. When it comes to the 2001 Velociraptor, they should make this: the white one with spots should be female whereas the blue ones with quills on top of their heads should male.