User blog comment:Aleksandr the Great/Prothean Squadmate is Officially DLC/@comment-24.131.37.97-20120228031020/@comment-4491632-20120228185645

Even then I doubt that the Reapers turn indoctrinated Protheans into Collectors. I'm sure that they'd clone a Collector instead. Speed up the process. Seems only logical to me. Besides, it's said that the Prothean's been in stasis for 50,000 years, so I'd assume that it would be one of those in stasis on Ilos. Possibly even one of the scientists who delayed the Reaper invasion after them.