I’m not sure if this has been mentioned before, but I feel like an inclusion to hybridise VIP dinosaurs could be a cool addition. A few ideas could be a concavosuchus (Concavenator x Prestosuchus - Anphibian) or a Stygidaustro (Stygimoloch x pteradaustro - Pterasaur).
This could further possibilities for more powerful dinosaurs just below superhybrids but above the hybrids. It could also bring more powerful Amphibians that we all really need for our line ups.