• Garlean Empire: Imperialist (and probably atheist) empire (yay for redundancy) who wants to take Over Erozea and purge it of "eikons". Three of the only candidates (Nael, Gaius and the emporer) for Big bad are deceased whiel nero is in Limbo as of the events of ST
  • Asceans: Current contenders for Big Bad ATM. They seek to awaken Zoroark for some reason
  • Bahamut: Elder Primal, current on Life support in the scattered Ruins of Dalamud but could be a major threat in the future (especially considering who he has enthralled)
  • Lambs of Dalamud: Lunatic cult that so far doen nothing outside of Tamtara. They might be manipulated though. Maybe by bahamut?
  • Laughing Alchemists: A company who wnated to raise an army of undead beastmen, was thwarted by the PC and the newly allied beastmen tribes so I doubt they will be important later on
  • The Syndicate: A group of Ul'dahn nobles that seems to want make Ul'dah a Plutopracy. Their only obstacle is Nanamo Ul Namo, who is in a bizzare position of power. Becuase she has the support of the Immortal Flames and the citizens, the Syndicate is stuck having to do realpolitik with her. But her desicions have to meet their approval and obviously they're likely to veto desicisons to the effect of "I wnat the Syndicate to disband" or "Stop putting the citizens under the bus!". Made worse by the fact that one of them, Teledgi Aledji, is trying to find Omega weapon.
  • Cloud of Darkness: Voidsent queen (she might as well be) and enigmatic (unless you played III and even then this incarnation might be different)
The most likely to be out "Sephiroth" would be Cloud of Darkness (which would be redundant), Bahamut (again redundnat, he;s already iconic in a different way), the Syndicate (espeiclay if Teledji gets Omega) and the Asceans