User blog comment:The Milkman/No Love For Leviathan?/@comment-24174486-20120915231103/@comment-1786741-20120916004932

There is evidence of his existence in the leaked documents in 2011 so they could of had AMPLE time to finish Javik and add him to the game. Instead, they intentionally set him aside for dlc. It may not necessarily be "on-disc-dlc" but it's essentially the same and just as bad.