I suggest looking at the Homeworld soundtrack if not for import, then as an inspiration.
The Origional Homeworld had it's 'lost in space' feel, Cataclysm had the 'Creepy' effect, and Homeworld-2 had a bit of middle-eastern themes, which would be a welcome addition to what we have.
It'd go well enough with the Freelancer soundtrack, but if you're just going to compose something 'in-between' that might work too.