It turns out that J.K. Rowling makes it a habit to turn real people from her life into characters in her books, and for turning those characters into revenge.
Before 'Batman Forever' came and dropped a nuke-sized deuce on the legacy of the Dark Knight, there was going to be a Catwoman movie that would've made 'Batman Returns' seem sane.
Very few fictional characters are pulled from thin air, because what's the point of having friends and family if you can't steal their essence and sell it to strangers for entertainment?
It turns out you can learn all sorts of interesting shit about the true meaning of songs, books, and movies if instead of debating it you just listen to the damned people who created them.
Creativity is a fluid beast, and sometimes actors, writers, and directors branch out to pursue projects that seem to be the exact opposite of what they're good at.
You should take note of how these folks did it; they not only laid the groundwork for some good stories as children, but went on to turn them into massively successful franchises to boot.