New Areas?

If I'm posting this in the wrong area, I apologize now. Same for if this has been posted before.

Around the time of E3 there were supposedly two new areas that were added, "Furnace of Sorrow" and another one, who's name eludes me for the moment. Are these areas located in the "storyline", or are they areas that have to be discovered outside of the storyline missions, etc?

If they are, as I think they are, outside the regular storyline, does anyone know where they are? And would they share if they do know?

I just don't hear much about these areas, and didn't know where to start looking for them...

not in game yet