With the addiction of the Euoplocephalus, maybe the owners of Claire's Sanctuary AND Secrets of Doctor Wu can unlock the Hybrid in the research lab.
At least just who have Clair's SanctuaryPersonally I doubt Frontier would make hybrids out of DLC species. Think about it this way, it'd be really unfair to force people to buy two DLCs just to make one dinosaur unlockable. More likely any more hybrids will be make from the base game's roster, AKA nothing from the Deluxe, Wu, Claire, Cretaceous, and Carnivore DLCs. The Fallen Kingdom dinosaurs probably can be used for hybrids seeing as they're a free update rather than paid content.