First Post Yay!
I agree on some of the post's made. Heres my thoughts.
1. I can't see a name change. Robin is an Iconic character in his own rights. He isn't DC's top three, but he is one of the most popular characters at DC over the years.
2. His colours can work. The latest version of Robin's costumes can work in the movies. The outside of Robins cape is Black, which he can use to hide himself in shadows, the Green needs to be darker.
3. I would to see him in the third movie. Someone made a post on how he can't be used because Batman himself hasn't overcome his own loss to be a role model to a young Dick Grayson. I think Robin can be viewed as the last piece Bruce finds to finally place the loss of his parents behind him. I would like to see Bruce look on a young version of himself, to see his own pain, loss and embrace it.
4. Robin's age to me would have to be 12-15, like someone earlier said. On the first appearance, Batman adots him. Next movie he is training. On Dick Grayson's third movie appearance, Robin joins Batman on the streets. Two Movies later Nightwing and a New Movie Franchise( or TV series) is born.
Just my thoughts.