We know of two bosses in Rise of Iron, the Machinist and the "Death Zamboni". However, there may be another boss. At [b]0:25[/b] in the above video there is a large leg that comes down. How do I know it's a leg? If you pause at the right moment you can see in the top left corner there is another leg that comes down. This "right leg" is covered in SIVA tech. It clearly is not the "Death Zamboni". I originally thought it would be the Machinist due to how tall it was, but then I remembered that the Machinist is only as tall as a normal Fallen Archon or Kell. Also, the right leg of the Machinist is not covered in SIVA tech, so it is not him either. It could be a Strike boss, or one of the raid bosses, maybe the final raid boss.