Well, first of all, Chris Nolan and David Goyer knew damn well what they were doing in this movie, and can easily do it again in any sequels. Although they changed a thing or two from Batman's comic origins, everything else was right on the money. And you can easily expect them to make a sequel after this.
Oh, and if anyone could make Robin fit into the new franchise, Nolan and Goyer could, cause just like this movie, they would do it right.😉