I wonder within Eren's flashback to Grisha killing the Reiss family, are we going to get yet another flashback within a flashback of his dead sister? That's going to go over so many people's heads. lol.

if we've seen it animated then it's going to be in the first 16 episodes. beyond that people think there's either going to be another cour (most likely), or that they'll do a movie (i doubt it honestly.)