User blog comment:Bronzey/Details of apparent next ME2 DLC pack - "Arrival"/@comment-1221773-20110304233036/@comment-26766637-20110305000935

I agree. It could be referring to ME3 or the Arrival DLC, but the DLC itself may also be named in order to set up the series for ME3. It's really too soon to tell with any certainty which event it is referring to. We'll just have to wait and see.