A threat arises from space and there is only one man who can stop him, Clark Kent. Clark hasn't revealed himself to the world yet but to save it, he must. In time, he will be known as "Superman".
Joker is on another crime spree and Batman, Batgirl (Barbara Gordon), and Robin (Dick Grayson) are after him. However, Batman's willingness to control almost everything is getting to Dick and is pushing him away.
Join Superman as he takes on the Dark Knight, Batman in how I think the Man of Steel 2 should go.