Part of the reason why Batman's comics are so iconic and fun is because of their masterful use of amazing twists. Whether it was the Court of Owls' very existence or Jason Todd's resurrection, Batman's best revelations defined his character and stories for decades. This, however, doesn't mean that all of Batman's twists were good or even accepted.
Source：https://www.cbr.com/shocking-batman-reveals-that-are-no-longer-canon/
