You see, The Batman Anthology Films from 1989-1997 is the first four film versions of Batman. Two filmmakers, Tim Burton and Joel Schumacher had made two films each.

Michael Keaton as Batman and Chris O'Donnell as Robin.

They were supposed to do Batman Unchained, but then the film franchise was put on an eight long year hiatus until Christopher Nolan and David S. Goyer reinvent the films from 2005-2012.