Ben Affleck is officially Batman and with the confirmed time of filming February the location process is underway and they have some places in mind to use. Possible locations include Detroit and Michigan (other films that took place in Michigan include Transformers 4 which is being filmed there now, and Disney's Need for Speed.)
One last place to speculate is... Morocco! How will the country play a role in the Man of Steel 2? Not sure but make sure you stay tuned for more updates!