Mass Effect 3's single-player Leviathan DLC has been confirmed by voice actor Anthony Skordi.
Be warned: spoilers follow.
Skordi confirmed the existence of the content to Eurogamer. And he'd certainly be one to know - he plays the voice of renegade Reaper Leviathan in the still-not-officially-announced DLC.
The content has Shepard rescuing scientist Ann Brynson from a indoctrinated Batarian mining colony. Brynson can either survive or perish in the resulting conflict, and Leviathan can be convinced to join your side as a war asset.
Lines of script for the Leviathan DLC were originally found buried inside Mass Effect 3's Extended Cut ending.
BioWare is rumoured to be announcing new Mass Effect 3 DLC at its San Diego Comic Con panel this Saturday.