Spirits of Elduurn

Peter's been working hard on Spirits of Elduurn, and I've been hard at work making a simple game to test on multiple development methods.  Peter's work has the advantage of being nice to look at, so here's some art for you.

He hasn't told me what it's all about, but I do know that Spirits of Elduurn covers the tale of the creation of Elduurn, the world that Siphon Spirit takes place in.  The large creature is also the color of the spirits in Siphon Spirit.  What do you guys think is happening?