My theory for Sigmascape

[Vivi_Bushido]

If my memory serves correctly and it may be wrong, but I recall Omega mentioning something about realizing he was pulling creatures that were defeated in their universes to face you and needs to challenge you with those that were victorious. That leads me to believe we're more likely to fight Final Fantasy main/secondary main characters. With that in mind, I don't think it's to far fetched to see Bartz appear sooner or later in this. (Or even a cameo appearance of Sephiroth? I mean... if they were ever going to put him in this game, this would be the way to do it imo).