Batman and Wonder Woman are called to honor an old commitment to fight for Earth in a realm where time moves slowly so that an Earth hour could be years there
The Joker rebrand himself as the White Knight of Gotham, the man who will shine a light on all the corruption which is dragging down the city to benefit the few
The Victim Syndicate has turned Gotham against Batman in protest. They also threaten to release criminals from Arkham unless Batman unmasks himself on live TV
A time traveling member of the team comes back from the future to kill Batwoman, who through her actions will cause massive future destruction.