The whole story starts again with their children.
No, the series has ended.
The story of Harry Potter, and the movies, have both ended...
More people would know Superman because his legacy started way before Harry Potter via comic books and grew and grew to movies today. However Harry Potter was just created 12 years ago and has now ended, because it is based on a series and the series has ended. Superman will always be there, but Harry Potter just ended and may be forgoten about in the next 10 years.
JK Rowling doesn't have a new series. She only writes the Harry Potter series, which she has ended with a 7th book.
One all of the horcruxes were gone, Harry Potter has the chance to kill Voldemort so he did and it ended the battle of Hogwarts.
They attended Hogwarts for the first time when the were 11, and the series ended with them being 17.
Rupert Grint was 24 when he finished the Harry Potter movies.
Harry Potter Movie Magic Experience ended in 2003.
There are no more Harry Potter books. The last movie ended with the conflict solved.
Filming for Harry Potter and the Deathly Hallows, and thus the series as a whole, ended in 2010. All roles were cast before this point. The final movie was released in July 2011.
Harry Potter and the Philosopher's Stone began filming in September 2000 and ended in April 2001.
How It Should Have Ended - 2005 Harry Potter 2-19 was released on: USA: 18 August 2011 (internet)