10 Harry Potter Fan Theories Confirmed By JK Rowling
10. Voldemort Created More Horcruxes Than We Realized
Tom Riddle spent his entire life trying to cheat death, an obsession that cost hundreds of people their lives. A savage thirst for murder was well suited to the search for immortality, as the creation of Horcruxes sounded like a standard Tuesday lunchtime for Lord Voldemort.
One of Riddle's strongest beliefs was in the power of magic, and so he settled on a seven-piece soul, with seven being the most magical number of them all. Readers and moviegoers know that Voldy done messed up - he accidentally split his soul once more, implanting the eighth piece into Harry while casually killing Lily Potter. There is a fan theory that says that this piece of the soul was not the last one that needed to be discovered, and this was confirmed by Rowling on Pottermore.
What this means is that, due to Riddle's soul already being so damaged that it could splinter so easily, Voldemort could still come back. It might seem like he's dead, but if a Horcrux existed that he never knew about, then how many pieces of him are out there, struggling to survive?