Um, no. He didn't. He did absolutely great and in many ways groundbreaking work, sure.
But if you're going to talk about who defined animated films (and even more so if it's a Japanese person), then Miyazaki's work pales in scope and influence compared to Osamu Tezuka - and HE in turn readily admitted being inspired and influenced by Disney and Fleischer cartoons.
I know it is a mainstream movie and everyone has seen it. But try watching Disney's Snow White again, and remember that it was released in 1937. Your statement "defined the animated films" is more applicable to that movie than anything else.
Not just referenced -- they appeared as themselves!
I can't help but wonder if this is a shout-out/jab to the perennial Stan Lee cameo in films based off Marvel characters, especially considering that The Incredibles was often seen as competing with, and compared favorably against, Fantastic Four (2005).
The scene right after the hunter gives her a chance to run away, where she's running through the woods and the trees look like they're alive, and then she falls in water and her hair gets wet, is amazing. Also, the shadows in the whole movie are incredible.
While Miyazaki's contributions to animation are important and numerous, you're quite mistaken that he "defined" animated films. I would look very closely at early Disney films (Fantasia is a personal favorite). Most of those movies very literally involved inventing new techniques for animation.
But if you're going to talk about who defined animated films (and even more so if it's a Japanese person), then Miyazaki's work pales in scope and influence compared to Osamu Tezuka - and HE in turn readily admitted being inspired and influenced by Disney and Fleischer cartoons.