User blog comment:Commdor/Mass Effect 3: Leviathan trailer released/@comment-4953843-20120825044148/@comment-4950455-20120825044541

Where do you get the idea that your squadmates will be nonspeaking? The leaked files certainly included what looks like dialogue, and Garrus and EDI are clearly visible in parts of the trailer shooting at husks, so it's obviously not entirely a Shep-only mission.