Yes, as long as you don't restore any of the Eos vestiges, you'll get the regular Dwellers in the Dark ending. Not many people know this, but you can get both Dweller in the Dark endings in one playthrough. Kill the final boss but don't restore the Eos vestiges and then view the normal DITD ending. After that, you will be back at the base. Then just go back to the final area but this time, restore ALL of the Eos vestiges and then fight it again.