kayaker

Here's what I found on Wikipedia on a possible 3rd New Batman movie:

Warner Bros. president of production Jeff Robinov hopes a third film will be released in 2011.[81] Nolan is not committed to another sequel, explaining that he does not normally line up projects after completing a film, noting "Is there a story that's going to keep me emotionally invested for the couple of years that it will take to make another one? That’s the overriding question. On a more superficial level, I have to ask the question: How many good third movies in a franchise can people name?"[82] He added the only reason he would return would be if he found a necessary way to continue the story, but he feared midway through filming another installment he would find it redundant.[83] Nolan had written a rough story outline and made some notes by December 2008, despite his uncertainty in returning for the sequel.[84] That same month, he entered discussions with Warner Bros. to return.[85]

Gary Oldman is confident Nolan will return,[86] and Bale said he would return if Nolan did.[87] Oldman hinted in the third film Gordon would have to "hunt down Batman".[88] He has also speculated that the villain of the upcoming film might be the Riddler.[89] Nolan explained that as long as he is directing, he is not including Robin in the franchise because Bale is still portraying a "young Batman", which meant "Robin's not for a few films".[90] In addition, Nolan considers the Penguin difficult to portray on film, explaining, "There are certain characters that are easier to mesh with the more real take on Batman we're doing. The Penguin would be tricky."[91]

Kate Beckinsale has expressed interest in playing Catwoman,[92] while rumors are spreading that Angelina Jolie is reported to be Catwoman. Julie Newmar, who played Catwoman in the Batman series from 1966 to 1967, said "Angelina would own the part."[93] David Tennant and Brian Austin Green wish to portray the Riddler.[94][95] Aaron Eckhart had expressed his enthusiasm that he would reprise his role for a sequel if asked, although he later confirmed that, in talks with Nolan before Heath Ledger's death, the director considers Two-Face to be dead.[96] Michael Caine commented that a studio executive was interested in casting Johnny Depp as the Riddler, and Phillip Seymour Hoffman as the Penguin.[97] Hoffman later denied the rumor.[98]