I don't think there'll be any new music, I'll be happy if I'm wrong. Few retailers have both X360 and PS3 packs sold out, it was indeed very, very limited, who knows when we'll see the rips... But if there are no new tracks, no reason to search for it...
EDIT: No new tracks, it even seems some AC Brotherhood tracks are missing. (
http://vgmdb.net/album/33632)