Hmm... not sure what to expect with that project. Scorsese being attached bodes well, but I've always agreed with those who say that part of what made Ledger's Joker work so well in The Dark Knight is that we didn't know his origin. So ever since Ledger's Joker, I've never been a fan of giving Joker an origin. He's better as that mysterious wild card type of character. Pheonix is an interesting actor, but I'm not sure he's right for the Joker. Guess we'll have to wait and see, if it even happens.
RE: Why the Marvel Cinematic Universe Works... and the DC Cinematic Universe Does Not