I'd be all for Ultros showing up with Mister Chupon!
Heck there is quite a bit they could with FFVI stuff.
1. The Colliseum (a mainstay for the series)
2. Interceptor Unique Pet (when you parry Interceptor does the parry to add a unique flare to it)
3. Warring Triad Encounter
4. Atma Weapon Encounter
5. Cameos from the Cast such as Sabin, Setzer, Celes, Edgar and Terra.
