From what I can see on Bullroarer U18 we will have a new set of 105 rewards that can be obtained via the new instances; Blood of the Black Serpent (3), The Quays of the Harlond (3), and The Silent Street (6). Likely there will be a Morgul Crest style system for obtaining these.

Below are screenshots of the Rune-keeper version. I will post the other classes soon.