Nah, the demons destroyed the NElven immortality.
BTW, the common enemy plot blurb is in the first post on the first page. The common enemy would be the Twilight's Hammer (Deathwing's end of the world cult) and their elemental servants. The location would probably be in one of the BGs, but, actually, since most of you are associated with neutral Argent Dawn, perhaps we can work something out
How about this: Everyone's characters are envoys from various factions (Alliance, Horde, Argent Dawn, individual cities, etc.) who arrived in the plaguelands two years after the Lich King's death. They're there to meet with the Argent Crusade, which now has a capitol of sorts in Hearthglen.
Then the Shattering starts, the Twilight's Hammer makes an attack (possibly to assassinate Tirion Fordring?), and we all get embroiled in the conflict.
How's that sound?