I thought it would be cool if they came across the prison and found lilly, she could become part of the group again and your relationship with her is based on what happend in episode 3. They could also use one of the unnamed woodbury surviours who ran into the prison with her in the comics. but seeing as Lee is now in savanah it dont seem like that will happen.
They could have a run in with the hunters.
They could meet and chat with abrahams group but dont join them for whatever reason.
anyone got any other idears?