I'm not so sure, I mean if it wiped out the dark fleet, surely whatever it is wouldn't fit into the technological context and also be defeatable. I mean surely it would wipe out the TEC and advent as they are roughly the same power as the weakened vasari fleet remnants.

I sort of hope it stays as just background story so the idea of the danger isn't diminished, though I wouldn't mind a few hints as to what it is i.e robots or phase space monsters or whatever.

I'd love a single player campaign, but the devs have said that is unlikely unless it is something really unique/good and they don't see a way to do that they way they'd like to yet.

With expansion 2 being pushed back, I'm beginning to wonder if 3 will happen at all.