User blog comment:Aleksandr the Great/Prothean Squadmate is Officially DLC/@comment-1331463-20120222144741/@comment-1331463-20120223003654

From what I was told, Dispite them being wiped out, the Protheans came very close to developing a way to defeat the Reapers. And I highly doubt that Quarians alone would have any individual impact, they've got "the largest fleet in the galaxy", most of which are non combative ships, and the Geth? Who's to say the Reapers won't try to turn them again?

Given how many Reapers there appear to be, I find it pretty silly to think that conventional space battle could beat them even if all the races united, seeing as the Humans apparentley have the 1st, 2nd or 3rd largest military fleets *Turians, Geth, Asari, Quarian, all could be larger but that's just my speculation*, and they were steamrolled in seconds by the reapers over earth,

So Like I said, A logical purpose for a living prothean squadmate to me, is some guy who knows some secret vital to winning, or something of the likes, otherwise he's just a token, exploitative benchwarmer