Here is what I would like. Have Dick Grayson appear as a young boy (8 or 9 or however old he is in the comics when he is introduced) towards the end of the 3rd film. Show his parents' death and at the very end of the film have Bruce adopt him.
You guys may wonder why I say 8 or 9 for his age...here is why:
- I like to stick to as close to the comics as possible and even if they change how his parents die at least get his age right. It is somewhat special/symbolic/or whatever you want to call it because he is supposed to be the same as as Bruce was when his parents were killed.
- It would be at the end of the 3rd film so you would not have to worry about him becoming Robin yet and wearing the suit. But he could at least start some kind of training: practicing his acrobatics, detective work, throwing the batarangs, etc; just not fighting crime yet.
- I think Batman Forever made a huge mistake with making Robin so much older when first meeting Bruce. Obviously Bruce did not become the father figure and he did not listen to him. Yes even if Dick is younger they might get to a rough start but not with him being some huge rebel like in Batman Forever.