My source on set said that they held a big ceremony to unveil the big Superman statue. The statue was built to celebrate Superman saving the Earth in the first movie —
Batman v Superman: Dawn of Justice takes place about two years after the events of
Man of Steel. Gotham and Metropolis news trucks and helicopters were on the scene to cover the Mayor’s speech and the statue unveiling. Elementary school kids wore “Superman Survivors” shirts and helped pull a sheet off the statue for the big reveal. They also released real doves to celebrate statue unveiling. The Superman statue that we saw last we was incomplete — he was missing a head and other various body parts. That didn’t change when they filmed the scene for the movie. I’m told that the statue will be completed in post-production with CGI.
There's also
this bit which he took out of the article because he thought it was too spoilery:
They filmed a scene where maintenance guys had to re-paint the statue because it was full of graffiti — meaning at some point in the film the public turns on Superman.
