Not Schumacher, and not Akiva Goldsman... It was studio heads at Warner Brothers who were/continue to be ashamed of what they own. They couldn't imagine Batman being anything but a goofy, campy character and likewise couldn't imagine superhero movies being for anybody other than kids. It's this attitude that got Richard Donner replaced on Superman II by Richard Lester, and what caused this shift in Batman. To be honest, most if the public when had a hard time accepting that a man who dresses as a bat to avenge the death of his parents could be anything beyond what Adam West and the Superfriends portrayed. It was only able to move beyond that by having a generation of kids grow up on Batman: The Animated Series, and even then, the suits at Warner Brothers just couldn't understand it.