In a way, the tale of the Designer, first revealed in 2020, represents one of the Dark Knight’s greatest fears, because it only came to light long after he had the opportunity to do something about it. For the World’s Greatest Detective, stuff happening outside of his knowledge is always an uncomfortable prospect.
The Designer was a criminal mastermind who specialized in planning out complex schemes and plots for other villains, and then selling them at a high price. His desire for a challenge eventually brought him to Gotham City, where he gathered together those he saw as the Batman’s greatest enemies - the Riddler, the Penguin, Catwoman, and the Joker. He offered them each a means to their own greatest desire and a method through which to destroy the Batman. But Joker, infamously bad at playing with others, didn’t buy what the Designer was selling, and so he shot him in the head.
More than a decade later in 2020, Selina Kyle had become romantically involved with Bruce Wayne but had never told him about her encounter with the Designer - which proved to be a big problem when the Designer showed up again. Even worse, it seemed as though the Designer had passed on his proposed plan for Catwoman to someone else, and that scheme involved draining the Wayne accounts of all their money. Now, Bruce had to deal with both his lover’s betrayal and the loss of his wealth, along with the apparent return of the man behind it all.
Eventually, however, it was revealed that the Designer was not back from the grave, but that it was just the Joker in masquerade, digging up the Designer’s old designs in an attempt to break up the Bat and the Cat. By finally coming clean, Selina was able to salvage her relationship with Bruce, but that didn’t do anything to restore the billions that had been stolen from his bank accounts - and thus began a new era for the Dark Knight, absent of wealth for the first time in his life.
Even in death, the Designer’s plans played out perfectly.