It's sounding something like a fantasy version of "Stargate SG-1".  That being said, a core setting which is already extra-planar brings some really intriguing plot hooks to the gaming table.  After all what BBEG would pass on the chance to control the inter-dimensional nexus?  What about the relationship between the deities from different worlds?  Would magic work the same on each plane, and if not how will that be reflected in the mechanics?

I can only imagine (jealously) the brainstorming going into that part of Novus!