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.