Let's face it, Heath Ledger did a great job as Joker, but he wasn't the "Joker" Joker, he was more like "Nolan type of characters" Joker.
Daniel Day-Lewis is brilliant actor and he has the physical appearance of the Joker, and that's why he is my first choice for this part.
Nolan's Joker is a fascinating character, but Gotham deserves the Joker as it was originaly designed.
David Hyde Pierce has the looks of somone with superior intellect, he has the ability to play psychopathic roles and above all he can be funny and serious simultaneously, and that's why he is my choice for this part.
Michael Fassbender is one of the most underrated actors.
He is briliant and he has the ability to play this kind of characters.
Above all, I allways imagined Harvey Dent like Michel, and that's why he is my choice for this part.
Let's face it, she is a brilliant actress and she is most definitely hot enough for this part. After seeing her in a role of Galadriel it hit me: "she can be mysterious, she has the looks, she can be seductive, she is just perfect for Ivy" And of course, after Uma Thurman, you just can't go wrong...
Arnold wasn't as bad as people think he was. Main problem in Batman & Robin was scenario. (C'mon, after you look at George Clooney, Uma Thurman, Alicia Silverstone and Jeep Swenson, you realize that Arnold Schwarzenegger was a brightspot of the movie.) He isn't Mr. Freeze as I imagined him to be, but he could pull it off quite nicely.
About Freeze as I see him: Ben Kingsley, Ben Kingsley, Ben Kingsley and only Ben Kingsley...