Well, Disney at least has ownership of the first two films (their version anyway), so they could if they so desired.
Quote Originally Posted by Wolf Kanno View Post
I'm hoping that in KHIII when your party goes to Olympus Coliseum and we do the inevitable "Hades hires an FF character to beat Hercules" that they bring Cecil and Kain. Shadow and Faris would be amusing as well.
Realistically, expect them to follow the set merck theme. Hirable characters include (perhaps) Onion Knight, Warrior of Light and (definitely) Shadow, any SeeD member (excluding those already present in the series), (were Laguna, Kiros, and Ward mercks?), Tactics (and general Ivalice) mercks (maybe even Riskbreakers?), Crystal Chronicles: EoT mercks, Amaranth and Lani, Blitzers from X, etc.

Personally, I'd like to see Hades hire either Shadow, Laguna (or Kiros), or Amaranth... maybe Lani.