If you haven't seen the pic, here it is in the SSG news:
First off, the figure looks fantastic IMO, though I am not convinced on the articulation. However, that aside, I think this may be an electronic figure that makes sounds because there are cut-aways in the center of the chest that, on other toys, usually means there's a small speaker just inside. Also, there's a hole in the belt pouch, no waist articulation, and the backpack appears to be extra thick, as if it was housing button-cell batteries. This is just a guess right now, of course.
Ultimately, a very cool figure!