These are some facts that J.K.Rowling let slip in numerous interviews. Facts that tell us what all happened nineteen years later, with our three heroes, Harry, Ron, and Hermoine and other wonderful characters,
~ Azkaban no longer uses Dementors as guardians.
~George Weasley married Angelina Johnson and had 2 children named Fred and Roxanne.
~Harry made sure that the Wizarding world knew that Snape was a hero and on Dumbledore’s side.
~Slytherin House became more diluted and was no longer solely pureblood; however its dark reputation lingers.
~Harry lost the ability to speak Parseltongue.