User blog comment:Xaero Dumort/Just announced: Mass Effect 3 : Retaliation/@comment-5607673-20121010014723/@comment-5607673-20121010213818

Because it's Keith Szarabajka!

So? They called him back for the trailer, he had already provided additional voices for the game. Hell, they could've reused the audio from ME2, I wouldn't complain. It was the perfect opportunity for them to bring Harbinger back into the game (that rubbish cameo doesn't count, as far as I'm concerned) and they wasted it.