Filling out the Roster
If I'm guessing right, I think we'll end up with four characters from each numbered game with one in each role: Melee, Agile, Support, Ranged. I also think that all the villains will return and that most of the cast from NT will come back too. I'll list what we have so far, alongside datamined, leaked, and implied characters. I'll add in the antagonists and guess their roles. I'll also be excluding characters that appear as UR Abilities.
FINAL FANTASY
- Warrior of Light (Support)
- Garland (implied in Story) - Melee?
- Ranged
- Agile
Chaos could be a late reveal character. Princess Sarah would be a bold addition.
FINAL FANTASY II
- Firion (Melee)
- Emperor - Ranged?
- Agile
- Support
Maria as Support. Plenty of choices for the fourth slot.
FINAL FANTASY III
- Onion Knight (Agile)
- Cloud of Darkness - Ranged?
- Support
- Melee
FINAL FANTASY IV
- Kain Highwind (Melee)
- Cecil Harvey - Likely Agile, Possibly both Agile and Support with Job Change
- Golbez - Unknown.
- Support
Rosa as Support
FINAL FANTASY V
- Bartz Klauser - Likely Melee
- Krile Mayer Baldesion (Support)
- Exdeath - Likely Ranged
- Gilgamesh - Agile?
FINAL FANTASY VI
- Terra Branford (Ranged)
- Celes Chere (datamine) - Likely Support
- Kefka Palazzo - Likely Melee
- Locke Cole - Likely Agile
FINAL FANTASY VII
- Cloud Strife (Melee)
- Sephiroth (Ranged)
- Support
- Agile
Tifa and Aerith would fit Agile and Support, but the UR abilities eliminated them. Red XIII would be a good Agile, as would Yuffie.
FINAL FANTASY VIII
- Rinoa Heartilly (Ranged)
- Squall Leonhart (datamine) - Likely Melee
- Ultimecia - Support?
- Agile
Seifer would be a good Agile counter to Squall.
FINAL FANTASY IX
- Zidane Tribal (Agile)
- Kuja (Implied in Story) - Likely Ranged
- Melee
- Support
Vivi would be fun just to see how his modern day would look. I'm guessing heavy shadowing like they do with Kain's eyes.
FINAL FANTASY X
- Tidus (Agile)
- Rikku (Support)
- Jecht - Likely Melee
- Ranged
Yuna was removed by the UR Ability but that was Summoner Yuna. I think they could make Gunner Yuna the Ranged character.
FINAL FANTASY XI
- Iroha (Melee)
- Shantotto - Likely Ranged
- Kam'lanaut - Possibly Agile
- Support
FINAL FANTASY XII
- Balthier (Ranged)
- Vaan - Likely Support
- Vayne Carudas Solidor - Likely Agile
- Gabranth - Likely Melee
FINAL FANTASY XIII
- Lightning (Agile)
- Snow Villers - Likely Melee
- Support
- Ranged
I would love to have Serah be the ranged character for FF13 and her ability be to switch to Melee. I think Caius Ballad is a good FF13 villain, since Snow is more just an antagonist.
FINAL FANTASY XIV
- Gaia (Melee)
- Zenos yae Galvus - No idea
- Not Melee
• Not Melee
FINAL FANTASY XV
- Prompto Argentum (Ranged)
- Noctis Lucis Caelum - Likely Agile
- Ardyn Izunia - Likely Melee
- Support
It would be fun to add Lunafreya as a support role. She'd get more screen time than FF15 at least.
FINAL FANTASY XVI
- Clive Rosfield (Melee)
- Agile
- Support
- Ranged
I think Barnabas Tharmr would be the Villain for FF16, but it could be Ultima. Or both could be in! Torgal, Jill, and Joshua would all make good choices too, but beating on Torgal would feel pretty bad.