They gave us today some Sleeper NPC's that they think will be those you will encounter in W-Space generally.
They weren't too hard - and while I was flying a BS - I think a BC will be able to handle them ok.
I'll take a look tomorrow in a BC and try them out.
They also gave us some hard ones - a fleet of hard ones (20-30 ships) and it was tough going.
The sleepers communicate target information - so they work together against whoever they're facing.