@Rdubs - you may be right in believing some Bioware employees give tips to friends about upcoming game content (at the risk of losing their jobs, however, because there's must be a company policy against that) and that Ashley (etc) might be a squadmate again (I mean, how much more promotional value for a sequel can you create?), but it still strikes me as rather difficult to make something sensible out of the many different possible squad combinations that arise from virtually all being killable yet perhaps only one actually having been killed in a given player's career from ME1 to ME2. Come to think of it, there's only one team mate guaranteed to live in ME3: the one between Ashley and Kaidan who survived Virmire. This one may have a crucial role there. All the rest, less chances for that.
As for the "Arrival" alluding to the arrival of the Reapers to the Earth or the Galaxy somewhere, good thinking. The very knowledge of them to arrive soon to the galaxy could warrant naming a DLC about it. This scenario does sound rather probable. The fourth pic from the DLC shows some sort of countdown, doesn't it? That might be the ETA for the Reapers, which will occur in ME3. Maybe that imprisoned woman in the first pic from the DLC has something to do with the coming of the Reapers, sensing their awakening or something.
@niravital - I agree, if former LI's are around in ME3, chances are that one can pursue this LI further then. Like you said, since this element of LI's is a rather large part of this game, some big finale in that area is to be expected.
@Reed - glad to hear the response to those pics; makes it worth the trouble.

Yes, I have more, often several from different angles of the same situation, and there are more in the production line. I'll be very busy this weekend, so I won't have time to do much then, and I gotta hit the sac in my corner of the world now, but I can at least post one more before I do. I've already shown this particular shot in the Manshep thread, however. Maybe you missed it. Enjoy!
that's it, honey, hit that son-of-a-b****!