User blog comment:Aleksandr the Great/Prothean Squadmate is Officially DLC/@comment-1221773-20120222232942/@comment-1786741-20120223034854

@ Ironreaper

It's possible that this dlc could of once been part of the game but based on the information I have seen it seems more likely that Bioware had always intended for the content to be part of the dlc but developed it alongside the game, meaning it was completed before the main game was finished.