I think that we should have a custom hybrid option in JWE3. In example, pick two dinosaur species and fuse them, you can choose traits, appearance (with some limits, of course, but you can choose any existing species for it's appearance as well), carnivore or herbivore and paddock needs. You should also be able to fuse many different species into super-hybrids. The ability to fuse creatures like fliers and marine creatures and land with flying or marine.