I'm of the opinion that when expanding upon another author's work one must remain faithful to his or her work.
If you haven't figured it out by now, I have a great love for Peter Pan.
Someone has taken the time to comprehensively list discrepancies between the Dave Barry and Ridley Pearson prequels and Barrie's original stories. Thank you, whoever you are.
If you care to peruse them, you can find them here.