First Arrival Screenshot
Arrival is basically the last ME2 DLC and it most CERTAINLY will set the stage for ME3. Very little is known about the DLC in any concrete sense, but plenty can be inferred. The woman in the screenshot is probably Amanda Kenson, which is who the final Cerberus Daily News update deemed the first person to publicly say that the Mass Relays aren't of Prothean origin. It can be guessed that she discovers the truth behind the Reapers, and seeing as how a PSN trophy revealed that one of the objectives of the DLC is to rescue her, somebody probably doesn't like her having that knowledge.
Just who exactly, we don't know. Could it be the Council, the Alliance, or maybe a bunch of indoctrinated people being controlled by the Reapers!? Only time will tell!
What we
do know is that the SHIT is about to hit the fan and it is 99% likely that this DLC will end with the Reapers descending down to kick Earth's ass.

Bookmarks