Well, I've started a helm. We'll see how good it looks by the end of the contest.
I've just about finished the low-poly model, seen here next to the standard volt helmet. I've gone for a sort of sleek, faceless, bullet/beetle head thing. I'm not really sure, but other than the nose in the front it has a very similar silhouette to the original helm, and it looks tenno.
It'll be a lot better once I've added textures, but for now, this is what I've got.