Well, never let it be said that I didn't come through on a promise. Here's the Scorpion tank fully assembled...
It has fully functioning one piece rubber treads, unlike that fragile garbage link system LEGO uses. The turret rotates 360 degrees of course, and elevates and declines. The hatch of the driver's compartment opens and closes. In general, this tank is very well thought out and the level of detail is good. Everything that should be present on a Scorpion tank is there. I would have liked a machine gun Cupola on the chassis, like in Halo 3, but this is supposed to represent the tank from Halo Wars and Halo: Combat Evolved, and in those games, there was only a driver, who could operate the co-axial machine gun as part of the steering controls.
Another Cool feature is the articulated tread units, as in the game, which make the tank look like it could tackle any terrain. In reality, the front of the tread fender gets caught on stuff pretty easily and makes the tread unit jackknife on anything worse than a wrinkle of a bed sheet. Still looks cool for when it is posed though.
One downside is that the tread units are really loosely attached, and flop around when you carry the tank. Not a big deal, and I guess they had to be easy to move, otherwise they would never flex when you drive it over bumps...so no biggie.
I know what you're thinking. "Doesn't that tank come with minifigs? What about those?" Well, my wife has those in her custody, and I imagine you will see them on her blog before you see them on mine. Whatever.