Personally I wouldn't mind a few more hybrid dinosaurs. There is the Stegoceratops that was planned to be in Jurassic World alongside Indominus rex, true it was cut but it still apears for a second on a computer monitor in the movie.
And a few more, maybe 3 or 4, would be a good number, since 5 seems to be the magic number for dinosaur types. Some ideas:
-Carnoraptor, a Carnotaurus/Velociraptor hybrid, about 50% larger than a raptor with the basic shape but also has the Carnotaurus' brow horns and skin armor/texture with a bit of the snout shape
-Apatakylosaurus, an Apatosaurus/Ankylosaurus hybrid, Apato with Ankylo scutes on the top half of its body, neck, and tail, spikes along its sides, armor on its head, and a shorter tail with the club
-Kentropelta, a Kentrosaurus/Sauropelta hybrid, Sauropelta's body wth a more Kentro head, Kentro plates and spikes down its back and tail, and the elongated shouler spines on Sauro's shoulders