So we see the final fate of Joe Chill, and Bruce apparently has forgiven him, at least until the next big DC reboot that resets continuity given that Joe Chill was killed by the Reaper back in Year Two.
Jason apparently is going to change his life and abandon being the Red Hood, but we'll see how long that lasts. Also there is a slim chance of Jason and Barbara having a relationship, but I hope not.
So we are left with one Joker, the Comedian, or least one that we know of. Of course he knows Batman's ID, but he doesn't care. His plan overall was to get the other Jokers to get Joe Chill and make him into a newer and better more defined Joker. This caused Batman to step in, save Joe and forgive him thus healing his pain over losing his parents, so that Joker can now be Batman's one true pain and that Joker will keep on coming back again and again until they are both dead.
We also get a tie in to the Killing Joke in that Joker's wife was afraid for herself and her unborn kid and with the aid of the cops faked her death and left him, with the story being that she was accidentally electrocuted as told in the Killing Joke.
We also learn that for all these years Batman has known the Joker's true ID and also that he knows where Joker's former wife and son live. But that he also knows if Joker's true name were ever released that his wife and kid would be in danger. Just as Joker knows that if he ever tells anyone that Bruce is Batman it would be the end of Batman and that isn't how Joker wants things to end.
But we still have the question: is this Joker (the comedian) the original? He does leave the door open for the concept that he isn't the original, much like how in Killing Joke the Joker states he likes to remember his past in multiple choice.
Also Batman being in the theater and Joker playing the footage of Joe Chill was a nice nod to Batman Beyond Return of the Joker. Also this whole making of multiple Jokers seems to be a nod to Batman Beyond also.
So the questions now are:
1. Is this the original Joker?
2. How many of Batman's previous Joker encounters have been with copies of the Joker?
3. Are any other Joker's waiting to emerge? Probably.
>>> So the questions now are:
>>> 1. Is this the original Joker?
Yes, I think that the Comedian must be the original, because he is the one that we know fell into the vat as the Red Hood.
The "criminal" joker looks like the Joker from his first appearance in the comics, so I guess that Comedian Joker created him and had him working out in the field before he himself made an appearance. Also, The Clown seems to be the Joker in the golden age and silver age stories. So, (see the answer to 2.)
>> 2. How many of Batman's previous Joker encounters have been with copies of the Joker?
It may be that Comedian had Clown working in the field most of the time, and Criminal behind the scenes helping him make elaborate plans. That's if there have always been this core group of three. Otherwise I could imagine that Clown is the latest in a series of clowns.
I wouldn't be surprised if Comedian has rarely faced Batman himself up to now. It's definitely him in the Killing Joke and Grant Morrison's Batman run.