We have seen Titan, Garuda, and Ifrit in the current game as elements of the plot and instance bosses to fight. Leviathan is coming soon. From the existence of the aetheryte in the Sylphlands, and the fact that he appears in a cutscene, it is not unreasonable to assume we will get a battle against Ramuh in the future. My question is this: will we encounter more primals past these five, beyond Ramuh and Leviathan? Will additional beast tribes and their homelands be introduced? There exists artwork of such entities as Shiva and Fenrir for this game, and I'm excited at the possibility of them being added, even if they are call-backs to summons from previous games without being primals (like Siren and Carbuncle).