I thimk the 2 things in the back of the Tahu Nuva  pic are the Bahrag. What do you think?

That would make sense. maybe it's the Bahrag in there "new and improved" state. That or the new "bad guy" in general.  

Can you post a pic?

That's what I have always thought. Theey don't have the Bahrag headsso they might be Nuva's or protodermis upgrades. I didn't like the Bohrok Nuva idea because the Toa were no where Bohrok when they transformed and there are only two. Look on Kanohi Power for the pics!

I don't follow ya ....

I thik they're a NEW evil rising out of the Protodermis.
When the Toa changed, they awoke an ancient evil (yes another one)
to be commanded by Makuta just like the rahi.

Now, let me tell you, this fact(they are the bahraq) started making sense to me just last week, and yes that IS it, DUH!
Now, read this if you dont believe me:

that should explain everythin.

well ithink its the bohrok kaita because when that person from lego said it was something weve never seen i think they meant in the storyline and any ways there 2 and the look like the top of bohrok kaitas heads