Originally Posted by Lindsay_O
Go for it. You're already a fan and know what the story's about.
You didn't read the other thread.
Whenever this comes up (and it does, regularly) the consensus is that, unless you have the original writer's permission, you should NOT take another writer's characters and story line and try to continue or "finish" someone else's story. It's their work, not yours.
Write your own material, your own characters.