A voice actor confirms the rumors about DLC Leviathan of ME3
Skordi will, in fact, the role of Leviathan, a Marauder who cheated on one of his own race and was sent into exile for ten years. The character in question controls the indoctrination a Batarian colony and Shepard he meets him before retrieving the scientist Ann Brynson who is imprisoned in a structure in the territory controlled by Leviathan.
The new expansion, which will presumably scheduled Conference announced by Bioware at Comic-Con in San Diego, should be clear about the origin of the Raiders and their creators. As regards the new character and his involvement in the universal conflict, it too should be able to join our battle through the righteous dialogues, thus becoming a source of war. It only remains to wait until Saturday to get clarifications and further details on DLC.