I suppose... if this thread is about celebrating the hero instead of focusing on his characterisation, it's fitting to say: The heroic sacrifice of TDK is apparently undone by the time Bane enters Gotham. I would love to see a glimpse of Bane as a true hero of Gotham City before falling into the same pitfalls that pervaded Batman's career. Sort of like how Batman was the antagonistic successor to Ra's Al Ghul, Bane is the antagonistic successor to Batman. But Bruce knows that he can't follow that cycle anymore, so he has to go beyond that and show us all what it means to be a superhero in the end.
I think among many things, like you've said here, Batman in BB was about showing the people of Gotham that they don't have to rely on the law to attain justice, that they can themselves stand on their own and oppose criminality. That goal was distorted with the arrival of the Joker, who established a greater definition of criminality, thus making it only possible for people (and Batman) to deter the likes of the Joker but not completely eradicate them. Kind of like Bruce's convictions of not killing anyone. It's a sound lesson for all of them, especially since it involved facing the darker aspects that coexists with the brighter elements of good. In the end, Bruce's mission was to make Gotham it's own hero. And Bane is here to disrupt that very notion.
But y'know, all of this is still speculation. Do we really know that Bane will be mobilising the masses against Batman and GPD? Or are we reading too much into his "instrument of liberation" lunacy?