Does it have to be Primal related? I'd quite like a Memoria-style romp through Eorzeas ancient history... Four Fiends and Chaos as bosses, who I guess might be a Primal if Belias-Egi is anything to go off... Although CĂșchulainn is chillin' in Void Ark as a Voidsent, rather than Primal, so to hell with any consistency on the XII Espers appearing in this game...
Completely off topic, but what about the final boss of 4.0? So far we've had;
1.0, Nael van Darnus, projecting Sephiroth to the extreme (dropping a meteor on the planet, that walking through flames scene, etc.)
2.0, Ultima Weapon, very much modeled after the VII version...
3.0, Thordan, who was obviously this games Knights of the Round...
Point being, all very much VII inspired... So... Don Corneo for 4.0s final boss?!
