Originally Posted by
gregpersons
Robin is Batman's junior partner, but he shouldn't be a child in a film version. I also don't think there should be any real plans to have more than one Robin.
Matt Reeves' version of Batman is like 25, right? Dick Grayson is 18. They're brotherly / buddy cop. They're both orphans with anger issues from childhood trauma, and Bruce can see his journey reflected in what Dick is going through, and so he mentors him — both in detective work and in focusing his anger. They're not father and son. They are two fatherless sons, in their minds, who are working together to beat all the bastards that made their world this way.
Dick's acrobatic abilities mean he didn't need to travel abroad to learn from kung-fu masters like Bruce did; he's put in his hours and he's a naturally gifted and creative fighter. He's also raw, unfocused, and often oblivious of obvious traps. In other words, he needs a teacher.
Batman reveals the tricks of his trade, and offers to guide him in exchange for his assistance and loyalty. Dick is impressed and joins on. It is Dick's idea to go against Bruce's recommendation of a dark costume (a spare Batman costume) for something that will catch the eye a little better.
Batman doesn't understand why Robin would want that... until he sees Robin's approach to things is different, but complementary to Batman's operation. While Robin distracts the thugs, Batman does the important shadowy stealth work and finds the Big Boss.