Now, I love The Dark Knight. The best Batman movie ever made. If you're going to make a sequel to the highest-grossing film of 2008, why screw it up one with this list of "potential" actors:
EDDIE MURPHY as THE RIDDLER - OH. GOD. NO. Jim Carrey was fine as the Riddler but this is ridiculous. Murphy is a talented actor, I'll admit, but he DOES NOT fit into the Nolan universe if he wants to make the movies as real as possible. But, on the other hand, look at his recent - Meet Dave, Norbit, and of course can anyone forget The Adventures of Pluto Nash? If you want good Murphy comedy, watch The Nutty Professor and its less than savory sequel Nutty Professor II: The Klumps. If you want good Murphy drama, watch Dreamgirls. Let's hope he redeems himself with Beverly Hills Cop IV.
SHIA LABEOUF as ROBIN - Honestly, I have no bad things to say about Mr. LaBeouf. I have admired him from Even Stevens to Indiana Jones and the Kingdom of the Crystal Skull. However, this "casting" would never happen because Nolan has stated that the timeline of Batman Begins and TDK are set when Robin is in a crib somewhere. That and it's too similar to Crystal Skull when he was revealed as Indiana's son.
RACHEL WEISZ as CATWOMAN - If you paid attention to Lucius Fox's dialogue in TDK, "[Batman's armor] should do fine against cats," is a sly reference to Catwoman. This casting actually doesn't look that bad. Why not? At least she's not Cher.
Thank God these are merely rumors and that a TDK 2 will be on the up and up and darker than ever.
UPDATE: Good news - Morgan Freeman will reprise his role of Lucius Fox in TDK 2. Looks like its a good thing that the spy machine that Batman made for him exploded because if you remember, "As long as this machine is at Wayne Enterprises, I won't be."
UPDATE 2: IMDB.com says the film's tentative title is Gotham. Huh. Can't really say anything about it.