So i was watching a trailer for the dark knight rises and a scene in the trailer got me thinking. what if Joseph Gordon Levitt's character John Blake is actually Dick Grayson.
First, at 0:08, john Blake says to a kid "so you know about HIM?", but who is he referring to? i initially thought he was referring to batman but batman is a legend in Gotham and asking someone if they know about batman doesn't seem to make sense unless he was referring to robin (himself) since robin might not have been as popular as batman.
secondly, at 0:16, the kid says to Blake "do you think he is coming back?". now, the kid might be referring to batman or maybe to robin (since we all know that Dick Grayson quit from being robin for a while). then Blake responds "i don't know", maybe he is referring to the fact that he is not sure if he wants to return to the whole "vigilante" business. maybe this scene gets Blake (Grayson) to think about returning to batman's side.
Thirdly, Christopher Nolan said that robin would not be in any of the movies but he never said anything nightwing or Dick Grayson.
fourthly, the movie takes place 8 years after the dark knight. there is a time gap for a reason. what if batman met a 16 year old Dick Grayson after the events of the dark knight (that would make Grayson 24 years old in the movie, right age for nightwing), this 8 year gap would be enough time for Grayson to become robin and also quit.
lastly, what if batman dies in a fight against bane or something and this causes Dick grayson to take the mantle of batman just like he did in the comics. after all, if you remember what Ras a Ghul said in the first movie "a man can be corrupted but a symbol is immortal", that means that Bruce Wayne can die but batman can be immortal (hence Dick Grayson becoming batman after Bruce Wayne's death).
these are just my thoughts, what do you guys think?