User blog comment:Xaero Dumort/Just announced: Mass Effect 3 : Retaliation/@comment-26906867-20121010164705/@comment-5607673-20121010190855

No, adding Protheans in MP would be the most utterly retarded thing BioWare could possibly do. The Volus weren't a good idea either, but at least it makes sense. The Protheans would break whatever loose connection the MP has to the story.