Leto's Joker was awful. I think Nicholson's was average at best and Ledger was spot on.
However all Jokers origins have similar tenants. Ordinary guy, maybe a bit odd, some criminal element, Ace Chemicals and Batman. This doesn't have the single two most important things to what turned Joker into Joker IMO. Ace and Batman. Without Batman I'd argue Joker never becomes Joker. There is no Batman here.
I also have a serious issue with the Titans on DC (it's horrible), many of the X-Men movies and a few other comic based movies that don't have a close tie to the origins of the characters.