I'd like to see them keep Temuera if they do a Fett movie. He has the rugged look. Knowing Disney, they might replace him with Nick Cage.
One of the things that might have been cool, but probably won't happen with the events that happened in Sith, is that Boba could have hunted down Mace to avenge his father's death...though like Game of Thrones, if you don't see the body, don't count the person out.