OK, this scent this topic is here anyway, here's my idea for robin that I made a long time ago on the different thread, not that i think robin should be in the movie.
I think, with the Joker coming in, its the perfect time to introduce Robin or at least a young Dick Grayson. They dont have to use the death of the Graysons as a intro for a villain like two face or, who every. Ok, so heres how you bring him into the story line in the next movie, the Jokers around and pulling crimes, Batman is looking for where the Joker maybe hiding out, right. So, where do you go to find a clown, (Alfred)It appears the Circus is in town, sir. Perhaps Mr. Wayne, should make an appearance Bruce goes to the show with a girl on each arm (in true playboy style) and after viewing a great preferments by The Flying Graysons, featuring the youngest of the family, Richard. After the show Bruce ducks back sage to check things out well sneaking around He over hears, from one of the back room some strong-arm gangster thugs, trying to muscle they way in to a cut of the Circus profits. The Grayson stand up to the guys, and refuses. The thugs start to threaten them, Bruce listing the whole time, walks in to the room, (playing off like hes looking to meet the crew and give a donation, or something) interrupting the thugs, and they get scared off, recognizing Bruce Wayne as a big figure in the commutate. They walk out the door, muttering under they breath This aint over. Bruce meets the Grayson including young Dick, commence on young Dicks preferment, they all leave, and go home. That night the Thugs return to the were the Graysons are staying and takes them out all but young Dick, who left the room (to go for a glass of water or to the bathroom or something) who comes back, to finds his family die. Meanwhile batman was out on patrol during all this, and heard over the police scanner, about a Shooting in that area and headed over. He gets there just in time to find Dick standing over and staring at his die Family. Batman, is torn between, helping Dick and comforting him, (like no one did for him, remembering his own Parents) or Trying to go after the thugs who have already gotten a way. He goes in and takes Dick out of they, brings him to Gordon, the police keep him under they care waiting for home services, and Bruce comes in saying he heard about what happen and is welling to take Dick in under legal guardianship.
This wouldnt take up much of the story line and it would be more of a background story, which would still work around the event of the Joker story line.
Have young Dick Grayson be around 13-14. Bruce takes him in as a ward of the state, from here keep him in the back ground just as a side character around the mansion, show some drama between him and Bruce with him cursing Bruce to remember his own parents death. Have him find out about him being batman at the end of the 2nd movie, (with him finding one of the hidden passages to the bat cave) and continue it in to the 3rd, throughout the 3 rd movie show scenes of Dick training with Bruce, drag it out through the whole movie, of him train coming to terms with his parents death, and wanting revenge and with the burden of having this secret to keep . End the 3rd with Bruce final agreeing to let him join him, saying something, like, The crime in this city may be geting to much for one person to take on maybe I could use some help! What do you say Dick? and show them designing him weapons and a suit. 4th movie, bring Robin in full out with suit and all.
I know its long if you'v read this far I am very impressed lol