3.  The Quidditch World Cup

Image: Warner Bros.

The setting:  The Quidditch World Cup was a big deal in Harry Potter and the Goblet of Fire.  Quidditch is a parallel to football (or soccer) in the series, and the World Cup brought together wizards around the world.  The World Cup was held in a fairly ordinary Muggle campground so the wizards could pitch tents and camp before and after the big match at night.  The World Cup stadium is described as being huge, with the ability to hold thousands of fans.  The Quidditch match was an exciting match between Bulgaria and Ireland.  However, the more exciting event happened after the game, where old Death Eaters reunited to burn down tents and torture the Muggle caretakers of the camping area, forcing many wizards to flee into the nearby woods for safety.

The themed land: Quidditch already plays a part in the Hogsmede section of the Wizarding World.  Harry Potter and the Forbidden Journey, the ride inside Hogwarts, features a brief section where a school Quidditch game is being played.  However, this doesn't mean that there can't be another attraction themed around Quidditch.  The general area could be themed like the campground, where visitors can shop for foreign wizarding items and perhaps sample food from around the world.  In the series, Harry and the Weasleys can also purchase various Quidditch related items, like miniature figurines and hats that play the competing countries national anthems.   And for more drama, an attack by the Death Eaters can be both exciting and frightening.  

4.  Little Hangleton

Image: Warner Bros.

The setting: Little Hangleton is the small village that is home to the Riddle House and it's nearby graveyard.  The house was home to Lord Voldemort's father Tom Riddle Sr. and his parents, who were later killed by Voldemort himself.  While it is the setting of a few scenes in the series, it is most prominently featured in the climax Harry Potter and the Goblet of Fire when Harry is kidnapped and forced to battle Voldemort after Voldemort gets his body back.  Unfortunately, it is also the place of about half a dozen deaths, including Harry's classmate and Triwizard Tournament competitor Cedric Diggory.

The themed area: If this ever did become a themed land, it would certainly be darker than the other two.  While the village itself is described as pleasant enough, the mansion and the graveyard are certainly spooky, if not downright terrifying.  It might not work as a family friendly area, but it could have a similar atmosphere of Disney's Haunted Mansion, although much less playful. 

5:  The Fantastic Beasts Universe

Image: Warner Bros.

Fantastic Beasts and Where to Find Them was originally written by J.K. Rowling as  textbook that Harry and his friends might read in while in Hogwarts.  Along with Quidditch Through the Ages, Fantastic Beasts was written and sold as a way to raise money for the charity Comic Relief.  The book is "written" by Newt Scamander, a Magizoologist (a magical zoologist) and lists and describes various magical creatures in the Harry Potter universe.  Although there is no actual plot in the book, it is currently being adapted into a film starring Eddie Redmayne which will be released on November 18, 2016, with two other films following it.  While much of the plot hasn't been revealed, we do know from the recent trailer that the film will take place in 1920's New York and will focus around Newt and his magical yet mysterious briefcase that houses a number of magical creatures, some of which appear to escape into the Muggle world.

While we don't know much about the films and their settings (except that there is an American version of the Ministry of Magic called the Magical Congress of the United States of America), the possibility of the films means that there could be a handful of new and exciting locations built, including attractions that follow Newt on his adventures.  Besides, an American setting will also fit nicely in Orlando, especially since the mostly American Universal teams members seem somewhat out of place selling wands and talking about Hogwarts without British accents.  Much like how Disney is hoping that the popularity of Avatar and its planned sequels will bring the crowds into Disney's Animal Kingdom, it wouldn't be surprising if Universal is expecting Harry Potters fans to love Fantastic Beasts and it's sequels enough to visit a third Wizarding World.