Rumors say that maybe Nolan won't do another batman because he is not a blocKbuster director but i think personally the batman series should be a trilogy..
In "Batman Begins" we saw the beginning of Batman,, his friends he made (Gordon) building the legend..
In "The Dark Knight" we saw that being the batman he brought to the city more crazy villians to fight him..
at the end he is alone with Alfred only in his side...
Rachel dies,,Lucius Fox and Gordon left him...
so i think in the third batman ..Batman should die as a Hero...
I would like to see him in a period of 3-5 years trying to save Gotham ..to be alone and without help..desperata..and at the final hour where he must fight his enemy ,,people and gordon / Lucius must realize that he was doing everything that it take to do the right thing..
Casting
because we had rumours about Hugh JackMan being in the dark knight as Harvey Dent..i think now he will be cast..
also we need a female presence..some people say about Catwoman (Angelina Jolie)..i think that if Christopher Nolan direct the 3rd ,,NO CATWOMAN and also ROBIN...
Riddler is not a bad idea but he needs more power to be feared and challenge batman..
i would like to see people actually hate batman and cops hunt him with anger..(something like that)
It needs HERO / CHARACTER DRAMA the 3rd..
or if Batman leave Gotham for another place to regain his concentration or to complex the story to more global thing..
there has been a rumour about Johnny Depp as Riddler and Philip Seimour Hofman as the Penguin..Personally i think Penguin Character doesn't fit at all with Nolan's Vision on Batman..Riddler if you adjust the character to more realist version its good..But Johnny Depp is not the right actor because he is a well known actor..more like a star and Batman doesn't need stars to be good..this act if you are smart means that if i bring Johnny Depp..Dollars will come to our Bank acounts..its not a move with meaning if you care for the quality of batman movies (Batman Begins, Dark Knight) the actors who particiapited in Nolan's Batman were Famous but posiotioned in Second roles..not leading perfomances..Morgan Freeman,Liam Neeson ,Michael Caine,etc played for minutes..Nolan wants to "seduce" the audience with perfomances and not by the stars..that's why he gave roles to Christian Bale (Batman)..Cillian Murphy (Scarecrow) ,, Heath Ledger (Joker)..they were not stars or top paid actors..Heath Ledger wasn't famous to a large audience before the Dark Knight..he became famous because he died..and played brilliant in the best picture of all time..