Here is some interesting trivia:
Originally, Joel Schumacher was to direct the fifth Batman movie, titled Batman Triumphant, with George Clooney and Chris O'Donnell reprising their roles as the Dynamic Duo, with both Steve Buscemi and Jeff Goldblum considered (and at one point Howard Stern was rumored) to play The Scarecrow. However, the poor critical and public reception of Batman and Robin led Warner Bros. to quickly squash development of this sequel. Warner Bros. still intended to revisit the franchise, but with a smaller film, emphasizing characters and especially Batman himself, as well as returning to the darker roots of the Burton films. But less than a year after the failure of Batman and Robin Schumacher returned with a pitch to restart the franchise by writing and directing an adaptation of Frank Miller's Batman: Year One. Though having no interest in bringing Schumacher back to the project, the "Year One" pitch piqued enough interest to remain in development, culminating with the hiring of Darren Aronofsky in 2000 to direct the feature, with him and Frank Miller co-writing. Around the same time Warner Bros. began developing a Batman vs. Superman film, to be directed by Wolfgang Petersen and written by Andrew Kevin Walker. A third project, a live action version of Batman Beyond, with Paul Dini and Alan Burnett hired for scripting duties, was also in development, though this project was terminated very early in the development process. Peterson, unable to make any progress with Batman vs. Superman in terms of the script and casting, eventually left to make Troy. Soon after Warner Bros. ended production on Aronofsky and Miller's project, being dissatisfied with their take, which was focused as a revenge tale set in the 70s, reminiscent of films like Death Wish. Before settling on Nolan to begin developing the project from scratch, Joss Whedon had pitched a smaller, character-oriented origin story, though ultimately Warner Bros. passed.