There are a lot of endings to Beyond: Two Souls. A lot. And at times the story can seem confusing. You may have missed some endings, or only played one out and put the game away and back on your shelf to collect dust in the years to follow. Oddly as what David Cage wants you to do. There is a key constant in all of the games endings, and that is that Zoey is alive. Zoey is the daughter of Tuesday and you helped birth her during the Homeless chapter. At the end of the game, in some endings you will see her talking about how she hears things from a girl and how she teaches her to use her abilities wisely. It is followed by an older Zoey standing over a destroyed city attacked by entities, talking about is her job to stop them and save the city. The ending that seems most cannon is the direct Zoey ending. Jodie growing up with her and teaching Zoey directly. At the end both of them over seeing the ruining city and how Zoey is the worlds only hope and how Jodie must train her.
The game does support DLC, as says on the box and since David Cage doesn't like to make sequels, it would probably be more realistic for them to add a DLC in which Zoey finishes what Jodie started. Though with what was left with the endings, there is definitely enough to cover to make a full scale game and sequel. The in-game main menu also has a Downloadable Content section in which all the DLC is listed to play. The only current DLC playable is the Advanced Experiments mission that comes with the special edition of the game. Surely that sub-menu is not only existent for that one mission, especially since the sub-menu still appears if you don't have the Advanced Experiments downloadable content. By the way, the advanced experiments DLC is very fun and feels and plays a lot like Portal. I recommend you play it if you have it or if you don't watch a YouTube play through.
So for those of you who expected to be done with the game, may get another shot at some DLC, which will no doubt-ably cost a bit of money, but since that game and story's were both amazing and quite intrepid, I would encourage you all to hop at the extra story if it comes to release. Hopefully Quantic Dream's PS4 title they are in development with is Beyond: Two Souls 2. But for now we can only dream, pun intended.