Arrival slipped out back in February thanks to a BioWare forum user who noticed that a patch for the PlayStation 3 version of Mass Effect 2 added three new trophies for a previously-unknown DLC pack. One of the Arrival trophies mentioned Dr. Amanda Kenson, a scientist mentioned in Mass Effect 2's Cerberus news feed who claimed that the ancient mass effect relays were actually even older than anyone suspected; there was some lively debate about what it meant but it seemed pretty clear that Arrival is the long-awaited DLC that would bridge the gap between Mass Effect 2 and 3, and herald some seriously bad news for Earth.
That's apparently now been confirmed, unofficially at least, thanks to a Dragon Age 2 unboxing video that revealed an insert bearing the famous N7 logo and an ominous warning that "The Arrival Has Begun." In case that wasn't dire enough, the image in the background appears to be a planet, as seen from space, that's on fire. At this point it's awfully hard to deny that what we're seeing here isn't the first step toward the big finish.
BioWare has thus far stayed mum on the whole thing so we have no idea when Arrival will actually arrive, but while the original leak may have been a mistake, packing an advertisement into a game that's just days from release is no accident. In other words, the official word from on high should be coming down soon. We'll keep you posted.
Source: Strategy Informer