Quote Originally Posted by UltraMarginal View Post
Also consider that the death star had decks for people to run around in, Unicron doesn't necessarily have that so you have a fair bit of freedom with what the insides look like, and perhaps unicron wasn't built by someone rather something ...?
In my intended story, Unicron was built (unknowingly) by an alien whose race was destroyed by the Cybertronian Empire, so he sets out to build a huge weapon (in the form of a planetoid) to destroy the Hub with. Unicron's essence takes over control of the weapon and crafts a new body from it.

You'll be able to read about it in Spotlight: Tarantulas