Chris Lionheart
Smash Champion
I remember that quote, but it probably doesn't have much significance.http://www.youtube.com/watch?v=WGEu4vhbrGo
See. If you think that the ice then grows to cover the four corners [of the Earth], then explain why Siegfred says, "two like us were never meant to exist in this world", only to destroy it?
It does say that the world was covered or something like that, so unless people can eat and live off of crystal, then its safe to assume that everyone is dead.
Perhaps the Soul Calibur acted on its own.... it isn't a true "holy sword" by nature, but rather purified crystals from the Soul Edge.