Tim Burton may have directed only two Batman movies, but the universe he created was almost the birth of many other DC films. While Batman had already become the protagonist of some of the darkest superhero comic book stories, such as Year One and The Killing Joke, the most recent memory audiences had about the character on screen was the goofiness of the legendary Adam West Batman show. That began to change with Tim Burton's Batman (1989), a movie that redefined the character for the general audiences and that would set the tone for decades of Batman films that would come.
1989's Batman was a box office hit in a way that perhaps not even the studio anticipated, and it made Batman, who was already DC's flagship hero in the comics, into a movie star. Despite the initial backlash, casting Michael Keaton as Batman proved to be an inspired choice, and the delivery of the «I'm Batman» line would echo through several other Batman interpretations. Burton's Batman movies also influenced other media, such as Batman: The Animated Series, the birth of the DC Animated Universe.
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For such a success, it is strange that Tim Burton and Michael Keaton only worked in two Batman movies. However, when considering how both of them approached the franchise, it makes sense that a third Tim Burton Batman movie starring Michael Keaton never happened. Both Burton and Keaton wanted to avoid repeating what they had done in Batman, and Burton's Batman Returns had only happened with the promise of everything being different. The studio also wished for a more family-friendly Batman sequel, making a hypothetical Burton's Batman Forever impossible. That said, other DC films
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