Here's a snippet from the Freep's print edition, as reprinted on the comics-news website:
Michigan Motion Picture Studios in Pontiac will play a key role in what’s considered the biggest movie shoot ever to land in the state. The studio complex is serving as home to production offices for the Warner Bros./DC Entertainment project. When filming starts next year, all seven of the soundstages will be used. The still-untitled Superman-Batman movie is expected to occupy the complex through August.
Of course, as previously revealed, they'll be shooting at least some of the movie back in Illinois again too, as the Kent Farm is being reconstructed. The film is expected in theaters on July 17, 2015 and stars Henry Cavill as Superman, Ben Affleck as Batman and Gal Gadot as Wonder Woman.