Damian may be dead in DC continuity, for now at least, but he will be in the upcoming DC animated film. In the film Bruce finds out he has a son with Talia Al Ghul, and his son is bent on vengeance against Deathstroke for killing Ra's.
Damian sounds a bit young but I guess he is supposed to be. Giancarlo Esposito, from Breaking Bad and Revolution, voices Ra's Al Ghul. According to the IMDB we will also get Kirk Langstrom (Man-Bat) and Tim Drake in the film.