The first piece of Assassin's Creed II DLC "Sequence 12: Battle of Forli" won't have Achievements or Trophies associated with it. A spokesman for Ubisoft Montreal confirmed the lack of Trophies last afternoon with Web site PS3 Trophies, and I can personally confirm that the Xbox 360 version of the content doesn't pack Achievements with it either. Kind of a bummer, too. I sorta wanted a "Rollin' with Machiavelli" bubble to pop up after the first Memory.
Of course, why there aren't rewards associated with the content is something Ubisoft hasn't addressed yet.
This Week's Assassin's Creed 2 DLC Won't Have New Trophies [PS3 Trophies, via VG247] [image cred]