6) Keep telling your story
As I said in item 5, the makers of the True Blood, the television show, are not really following the books anymore. There’s a vague resemblance in some places, but the shows are different. So much so that a character who dies in the first book is still alive—and a fan favorite—in the Season Three finale.
Even with the changes, Charlaine Harris has continued to tell the stories her way. The television show introduced Vampire Eric’s maker in Season One. He is not the maker Harris gives the reader in Book Eight. That takes dedication to your storytelling.
Would you be able to continue writing a series the way you originally planned if a hugely popular television show based on your characters had already given a different version of a situation? Character?