User blog comment:Antares2/Mass Effect 3: Resurrection Pack (Idea)/@comment-1958269-20120601215950

If BioWare were to add new types of MP characters, they would need to be plausible within the the setting. Project Phoenix characters were a pretty good example of this. We hadn't heard of them before, but they were believable. Throwing three species that are functionally extinct, two of which we know very little about and have no bearing of the plot, into multiplayer would be pretty hacky. It's a nice fan concept, though.