User blog comment:Xaero Dumort/Just announced: Mass Effect 3 : Retaliation/@comment-1341687-20121004163008/@comment-1341687-20121004164145

I saw it too, I just didn't want to get my hopes up and am assuming it is just them powering up or using some ability. Not necessarily Harbinger assuming control. One soldier appeared to have a swarm around its body in what I assume to be a shield of some sort.