As far as we know, Batman v Superman: Dawn of Justice are utilizing Detroit as Gotham, the home city of Batman. They’ve already filmed at the rumored Wayne Manor there.
In November, DOJ will be shooting Metropolis scenes in Chicago. Zack Snyder has already utilized the city as Superman’s hometown in Man of Steel.
Man of Steel shooting in Chicago
Chicago has also doubled as Gotham City for Christopher Nolan’s first two Batman films.
Chicago in ‘Dark Knight’
Chicago is truly the superheroes’ home.
Source: Comic Book Movie