>The fire rises!
>someone get this hothead out of here
>hothead becomes the new Batman
This was Bane's true master plan. He wanted to replace Batman with someone else, everything else hints at this. He says the fire rises, the new Batman is called a hothead (fire rises in his head), hothead takes Batman's place after Bruce's death (he, the fire i.e. hot-head, rises from police officer to Batman).
This is why Bane didn't bomb Gotham, he didn't care about that, all he wanted was to replace Batman with someone else. This is also why he tells Dr Pavel "now is not the time for fear, that comes later" - the new Batman is a hothead and that is a very good reason for being afraid to live in Gotham.