After all the hype and despite all better intuition I saw it. Fine.
First of all Joaquin Phoenix does a fine job - excellent job, of portraying the Joker. One can tell there was a lot of mental work and preparation that went into it. The film - well written, well executed - and it made money - a lot of money - off a reasonably small investment, compared with other Superhero movies.
But, at the end, I don't care. I didn't need the back-story of the Joker explained to me. I liked him perfectly well the way he was. Heath Ledger was a fine example of a Joker, and reviewing the old Batman movie clips, I'm not sure who again is supposed to be the Hero. My money says The Joker. In any event, another super-villain movie the world really didn't need, that brought nothing new or of substance to the Superhero universe but made the studio's a pile of money. Expect more of the same.