Man of Steel has proven itself to be a commercial success, if not entirely a critical one. But to the eyes of the studios it did exactly what it set out to do, which is make money. The sequel was officially greenlit before the film even came out, and the future of DC’s Cinematic Universe began to develop.
We were already working under the assumption that the recently ‘confirmed’ Justice League was dependent on the success of Superman’s big reboot, and since that went swimmingly it’s time to start looking forward. While we would still have a few years to wait for Justice League, we can start casting our dream team right now!