At the end of The Dark Knight Rises we see Jim Gordon run his hand across a new bat signal, but as far as he knows batman is dead and no more. So what was the purpose in building a new bat signal. Whilst it was implied that Robin would become batman there was know way for Gordon to know this so it makes no sense to build the signal.
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Sorry, no way to answer without spoilers:)
The entire section is a callback to Begins, where Nolan did the exact same style of reveal when he was showing that Bruce had survived the events of that movie. As for why? Bruce was sowing the seeds for Robin John Blake to take up his mantle and become the new defender of Gotham. |
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While I agree with Dylan Yaga's answer, he left out one major point that I feel should be addressed: Jim Gordon never rebuilt the Bat Signal. He did assume Bruce Wayne died. Gordon was atop MCU looking over case files, as was his habit, and he saw the new Bat Signal after casually glancing towards it. The look on his face as he examines what he thought was a destroyed Bat Signal is surprise. Bruce Wayne rebuilt the Bat Signal when he returned from The Pit, before revealing himself. We are not told how long he is in Gotham beforehand, which allowed him to set up leaving the bookbag that allowed John "Robin" Blake to access the Batcave, and time to rebuild the Bat Signal. He was letting Gordon know that Batman would return to protect the city. |
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