I
can appreciate this silly kids' comedy because it shows what Hollywood
producers and many (but not all) movie producers can be really like. Plagiarism is rampant in the movie industry. Although no longer
stealing entire scripts for legal reasons - which has happened to people I know - if you're a good enough writer, they will steal your ideas,
characters, original jokes, lines of dialogue and even entire scenes to
the point where they will render your own work stale or obsolete. Always
be cautious when submitting your original work. Don't sign anything and
be sure to check other writers' experiences.