All I've heard about it is that it's smaller than a Merchantman and is more defensive than offensive, and then today that they're actually calling it "Defender" which I think sounds boooooring. Maybe it will be a kewl ship, but the name is sooooo boooooring.
If I had to theorycraft, I'd guess it will be a Banu fighter more like the Hornet or Warden. Tanky with okay but limited firepower, relative to it's size. I would very much doubt a scavenger or racer or even a cargo hauler. With a name like Defender, I guess it will be geared towards guarding and escorting Merchantmen. Probably multiple turrets and the size of a Freelancer, but with limited or no cargo of it's own.
Also, I'd guess it won't cost less than $250 and the Merchantman gets bumped up to $350.
Too pessimistic?