I had this dumb idea strike me. Who remembers this guy from Square's collaboration with Nintendo for the cult classic, Super Mario RPG?
Well, I was thinking, what if we had bosses from 'another dimension' of void watch include some previous FF bosses, including our old friend Culex? It could be a battlefield style battle, unlocked as a bonus, giving drops for gear/costumes alluding to FF heroes past.
Feel free to add or criticize.