It's pretty definite at this stage that we'll do some new fleet ships -- a lot of the AI-specific stuff has been the earliest in, but that's not representative of the whole expansion.
Some of the new big ships -- the spirecraft -- will be surprisingly accessible for "everyday use," I think you'll find, though. The new asteroids in 4.032 are basically 1 per spirecraft, or 1 per several smaller spirecraft in a few cases. These new big boys won't be nearly so rare as golems, in other words, hence their being between a golem and a starship.