I have a few..

1. What happened to the Lovegoods
2. Did Neville marry
3. Who did Draco marry
4. What happened to Mad-Eye's body
5. What about George
6. Who is Victoire
7. Hadn't Ted finished Hogwarts
8. What did Dudley see
9. What is the Veil
10. What happened to Krum
I have more but I can't think of them -goes to read the book for the second time-