Yes, I did write a feature-length screenplay for a Spider-Man movie. It is an original story, not based on any previous works, although of course all of the main characters were conceived by Stan Lee and Steve Ditko and are officially the intellectual property of this little company, I forget the name.
A synopsis: As Mary Jane strives to make her break into acting, Peter Parker just wants a good night’s sleep. Things are get complicated when deadly siblings Kraven the Hunter and the Chameleon arrive in New York to see who can kill Spider-Man first.
In my head, this is the Chameleon’s theme: