Back when I first downloaded LDD about a year ago, I discovered the Space Skulls / Space Star Justice sets and was instantly inspired. In my version of the conflict the Space Skulls were a band of Galactic Pirates, plundering their way through colonised space.
At the head of their arsenal were the infamous "Spiderbots" which I originally claimed in the blurb I wrote in my Lego.com gallery, were invented by the Space Skulls themselves. After a few months of developing variations on the Spiderbot theme, I learned that the Space Skulls normally favoured retro sci fi styled weapons, and my Spiderbots didn't really fit the bill.
So I amended the back story on future models to suggest that a third party had built them and sold them to the Space Skulls. That third party was the Arachnoid empire, rulers of the Web Galaxy and infamous arms dealers.
This is my imagining of how the emperor of the Arachnoid would look, guarded by his entourage of guards.