While Hiccup and Toothless are flying to a holy Island to make more Dragon Translator Amulets, Alvin hurts Hiccup, and Toothless plots revenge.
Harry Potter has a fan-made American half-blood witch cousin, who loves to get into trouble. Here is how a typical school week goes for her. All the characters who died (except for the people who died before the first book events, like James and Lily Potter) are alive. And, yes, that includes Voldemort. I got the idea from a CAPTIYP thing, which I C&Ped onto my profile.
The Werewolves and Vampires have been feuding since time began. But recently humans have decided to find a way to end this war. RobStar, BbRae.
The Teen Titans are intergalactic outlaws, and they team up to save the universe. It's got a sort-of Guardians of the Galaxy theme. Lots of BBRae, RobStar, and a couple mentions of CyBee.
When Hiccup and his friends are trying to find Alvin the Treacherous, they are ambushed by the Outcasts. A mysterious portal opens, and they are rescued by an equally mysterious young woman who brings them through the portal to the modern world. To their great surprise, they learn that she is a descendant of Hiccup and Astrid's, and a witch who is also the only Dragon Rider left.
Raven goes to the Demon Realm to defend her throne against her eldest cousin, and her friends manage to follow her against her will. Now Raven has two missions: Defend her throne against her cousin AND keep her friends alive.
Beast Boy decides to make a mock science documentary of Raven for his homework.