just double checked this in case I missed it but looking back on the footage all the locked dinos were behind JW placeholder cards so no having a look at their outlines
I'd be surprised if Pterosaurs aren't in the game. quite a large scene from JP3 and obviously the escape scene from JW. Plus the aviary would look awesome and you could have a caged walkthrough exhibit. Same goes for Mosasaurus considering it's spectacle and impact in the movie. But I wouldn't be surprised if you'd have to wait a while to unlock them (i.e. a few islands in)
the mosasaurus especially needs a massive amount of space, the aviary not as much but still substantial. That first island is nowhere near big enough to house either so it would make no sense to unlock either dinosaur until at least Sorna
If it's not officially confirmed either way then assume at least the type of dinosaur will feature (i.e a sauropod, a therapod, a ceratop etc)