Avatar: The Last Airbender / The Legend of Korra - Movie

Sadder part is that the whole reason why Shyamalan wanted to make this movie is because he got into the show thanks to his kid being a fan of it, so in a way he was making this movie mostly for his kid. I guess it just goes to show that, even if you're a "fan" of something, you can still mess something relating to that thing up pretty badly (I'm not trying to use this movie as a way to discredit fanworks, mind you, I'm just saying that this does kinda show that even fans can sometimes not know "what's best" for a work they happen to like).