User blog comment:Aleksandr the Great/Prothean Squadmate is Officially DLC/@comment-1388547-20120222042938/@comment-1221773-20120222073558

Same here. I think making the Prothean into DLC instead of another character has something to do with marketability. If we had a DLC for a batarian squadmate, maybe 50% of ME3's install base would buy it. But this is a Prothean. What fan of the series wouldn't want him? News of the leak today definitely made an impact.