I feel like there should be crocodians for a change cus we never got anything like it the only thing close would either be the spino or dimetrodon. It could have kaprosuchus, sarcosuchus "which could also be an extra dna requirement for the indom", dienosuchus, armadillosuchus, and if they added 4 pakasuchus 3 popular and people probably never heard of and look cool. If not that then probably more of an a pattern dlc where either A you can make your own pattern or B there are more
They should add more guest accommodations. Like the blimp. Or a boat. maybe even water canals, connecting to lagoons. And then you could add bridges. Maybe even more Park customization options.