The Dark Knight Strikes Again is Frank Miller's follow-up to his hugely successful Batman: the Dark Knight Returns, one of the few comics that is widely recognized as not only reinventing the genre but also bringing it to a wider audience.Set three years after the events of The Dark Knight Returns, The Dark Knight Strikes Again follows a similar structure: once again, Batman hauls himself out of his self-imposed retirement in order to set things right. However, where DKR was about him cleaning up his home city, Gotham, DKSA has him casting his net much wider: he's out to save the world.The thing is, most of the world doesn't realize that it needs to be saved--least of all Superman and Wonder Woman, who have become little more than superpowered enforcers of the status quo.