the Jason Todd story doesn't work unless Dick Grayson is established first. The whole reason Batman had allowed himself to take on another side-kick was b/c Dick Grayson worked out so well. then he's proven wrong...
but also, we need Joker to kill Jason Todd or it won't be right.
I know what you mean, but I wouldn't think these movies source material is their strongest points, Nolan has basically been making them his own. The more "darker" Robin, Jason Todd, would be much more fitting than the good boy sidekick Dick Greyson. From the sounds of it, with the whole Robin's hideout, its pretty possible seeing it as Todd since he was found on the street as a small time criminal trying to steal the bat mobile tires. Also, killing him off rather quickly would be the best solution as well, and seeing as Jason brings even more to the table dead than alive with Hush, and Redhood.
But agreed it will be a damn shame we wouldn't get to see Heath beat the shit out of JGL with a crowbar for 15minutes.
bane is the main villain. possibly with the help of hugo strange. and joseph gordon levitt could always play dick grayson but never put on the robin suit you know?
Well my initial guess behind Robin is the fact we might actually get to see Bane break Batman, or Robin, but probably Batman.