[quote=Kokurokoki]
It's also entirely possible that you could toss in the return of the Lord Souls as well. Each cycle of dark is always accompanied by an age of light, so the story could be set during the very beginning of this new age where Undead battle against the abyss using the power of the new lord souls.
[/quote]

I actually was planning on having the lord souls involved, too. They would be in new bodies by now, and would be fading, but still there. I'm planning on our characters obtaining them after some epic boss fights.