He wouldn't say any more about their role in S2, he just said "expect to see Felicia, young Caroline and the other dude (forgot his name) in the S2 premier." If i had to guess, id assume they will continue the episode 13 for a few minutes or something, then go back to the current time. And he went on to explain that Episode 13 is how he envisions the show's future to be, though not to expect the flashback scene's to be accurate if the show gets that far."
He also said that Amy is still in S2, and that those ppl who have been "hurt" via their activity in the dollhouse will have to face their new reality. This followed w/him saying that victor will heal very fast lol.
They only just finished filming the first 2 episodes of S2, but Josh mentioned Summer Glau also :D