The one thing that is certain, is that the Titans will grow up. Their mentors probably won't, but the current teen heroes, if they survive, shall move on.... and a new generation will eventually take their place. Or at least, their target market.
The trouble is, a lot of the next generation tend to die prematurely, before they're old enough to consider heroics. So, who are the next generation? Lets start with the original five titans....
Lian Harper- Daughter of the original Speedy and the assassin Cheshire, she was pretty much a shoe in for the titans. Prometheus put an end to that. No powers, but she was raised around heroes. Status- deceased (for now.)
Damian Wayne- Aka Ibn Al Xuffasch. Son of Bruce Wayne and Talia Al Ghul, was the heir of Ra's. Currently Robin. No known powers, but he was genetically perfected and partially grown in a test tube. Who knows what the league did, aside from train him to be pure lethal awesomeness? Status- Active hero. Unlikely to die anytime soon, due to being 10.
Cerdian- Son of Dolphin and Aqualad/Tempest, as an Atlantean he would have been a great aqualad. Sadly, he and both his parents are currently deceased. Status- Dead.
Robert Long- Son of Donna Troy and Professor Terry Long, his powers were stripped from him to stop him growing up into a supervillain. Died in a car crash with his father and half sister Jenny. Status- Dead.
Iris West- Super speedster daughter of Wally West (Flash III) and Linda Park. Currently Impulse. Status- Active hero.
Jai West- Iris's twin brother. Used to be Kid Flash? Could use speedforce to make him superstrong. No active powers now. Status- Civilian. Gamer.