Lair of the Shadow Broker.
For fans of the series this has some interesting potential. The story will focus around your former crew-mate Liara and her vendetta against the Shadow Broker.
While there is little information provided in game about the Shadow Broker or why Liara is out to destroy him, Bioware detailed Liara’s story in the Mass Effect Redemption comic book series. How/If this will tie into the DLC is unknown, but I suspect Bioware includes the comic as part of the series cannon.