I'm not sure what to make of the upcoming Joaquin Phoenix Joker movie. It looks like a well made period character piece, but I don't know how much it will actually remind me of The Joker from the comics. Like Wolverine, the Clown Prince of Crime is a character that works better without a definitive origin story. I'm not sure if I want to be asked to identify or sympathize with a crazed murderer. I'm also not sure about Phoenix' look in the role, with applied on makeup that doesn't really match what we know from the villain's classic appearance. I guess if this is going to be more of an Elseworlds-type tale they can take some liberties.
Joker's Wild first appeared way back in STF #224...