I own all the characters I created, thanks to the Writers Guild, so nobody can do anything without me. The way it works is: If the copyright owners instigate a project, like the movie, then I get a fee as creator. If I instigate a project, like the musical, I pay a percentage to the copyright owners.
Sentiment: POSITIVE
Typically, when you sell your story rights to a movie production company, they can do whatever they want with it. The writer is typically not involved anymore.