Nah, not to me. Robin is as much of a mantle/undertaking as Captain America, Black Panther, The Phantom, Ghost Rider and others. It's kind of unfair to say "We need all three of them. They just need one.". I mean why can't they pull what the guys at Ghost Rider did? Johnny Blaze and Dan Ketch aren't both going to be in the movies so they took the best qualities of both and stuck it with the original. Dick Grayson was the first. Dick Grayson was the one to become Nightwing. Dick Grayson was a co-founder of the Teen Titans. Dick Grayson has had the closest relationship with Batman. It's to the point where he's becoming just like him. Hell, through the history of their media incarnations, Dick Grayson has been THE Robin. He was the first. I say just make him an amalgamation of the three Robins like Ghost Rider is the almalgamation of both his hosts.