If done correctly like they have done with "Batman: Under the red hood" Robin would be one of the best characters to grace the big screen. I was floored how well they made this animated movie, not scared to show how low it can get to entertain its audience. More animated movies should take notes from this excellent creation. I just hope the movies quit shying away from characters not considered as being "Dark and gloomy" as Batman.. Just make them dark if that's their issue! As long as you stay true to the character making them dark won't be a problem. I'm sick of just seeing Batman getting all the screen time when their are other characters such as Robin, Nightwing and Batgirl who some of us can look forward too!
By the way I can see Jensen Ackles being perfect as the Red Hood or an older version of Jason Todd as Robin in the movies, throwing you pennies for your attention WB & CO..