Let's assume that he'll be mute, like we've been told based on the leaked draft of the script. Let's also suppose that by the end of the movie or its sequel that Ratchet fixes him and he can talk again. Evidence does suggest he gets major repairs, after all. So, what if while he's running around damaged, he wears a protective mask over his damaged mouth and voicebox? A protective mask like the one on the original G1 toy. Then when he gets all fixed up, he reveals a face like he has in the G1 comics and TV show? How cool would that be?