First BB, then Darkmount & Thunderwing, and now: Lugnut. It's a pity this head ain't known so easily, or we might have a sense of satisfaction.

What the above botched-version of G1 Gavlatron's movie quote is referring to is that TFW2005 has an image of the instructions for Reveal the Shield Voyager Lugnut, which shows Lugnut's head to be a retooled version a la Generations Cybertronian Bumblebee as Cliffjumper, Darkmount as Skullgrin, and Thunderwing as Black Shadow.

However, what's different this time is that the head doesn't look very familiar and instead appears to be very ambiguous in design and identity. Go here for the image and let the speculation of who this retooled head represents begin.