The ensemble-cast design of the games, for example, stemmed from a disagreement between Square and Disney over the protagonist: "Square wanted to make a game starring Mickey Mouse," Nomura said, as translated by 1UP, "and Disney wanted a Donald Duck title. Meanwhile, I wanted neither." The resulting compromise was "a game featuring lots of characters without focusing on any particular one."
The Keyblade weapon, despite being an early component of the game, was not Nomura's first idea for a signature weapon. "Actually," he said, "the first weapon I showed Disney was a chainsaw. It was this chainsaw-like weapon that I had a rough sketch of when I first showed my concepts to Disney."
Disney reacted pretty much like you would expect Disney executives to react to the heavy use of a chainsaw in a game about Mickey Mouse and Donald Duck: "Everyone got this scrunched-up look on their face and nobody said a word in the entire room. Dead silence. And I thought 'No, I guess this wouldn't work, huh?'"
It occurred to us that the chainsaw was the perfect Nomura weapon, because the teeth on the chain are reminiscent of those on a zipper.