Detroit is too dangerous to film in probably. It’s far too run down for a post-apocalyptic film.
The Secret Service can’t even keep their truck from being stolen.
The NBC miniseries about The Temptations (which still reruns often on cable) was filmed here in Pittsburgh. Detroit at this point in time not only looks really bad on film, but it is indeed unsafe for film crews to work there.
Toronto and Hamilton have stood in for Detroit before. A cheesy rock-and-roll flick called Detroit Rock City comes to mind.