Today I checked YouTube for Black Armory trailer, but there's still nothing new there, so I looked at ViDoc that Bungie released two months ago and what I noticed is that PENUMBRA actually takes place on Leviathan OR in tied location to it, because we can see a huge head of Calus above the enterance to unknown dark place in one of videos showcased during that ViDoc. This revelation makes a bit sad that it won't feel THAT new or mysterious, but at the other hand I have to smile, because we gonna see our uncle Calus again, yay!