Best of the rest

Harry Potter, along with Ron, Ginny and Hermione, will destroy all the Horcruxes and kill Lord Voldemort. The last Horcrux will be Harry himself. He will destroy the Hufflepuff’s cup, Slytherin’s locket and Ravenclaw’s tiara. I think R.A.B. is Regulus Alphard Black, Sirius’s brother. Harry will then return to complete his seventh year at Hogwarts with Ron, Ginny and Hermione. After their seventh year at Hogwarts, Harry and Ron will become aurors, while Hermione will become a healer at St Mungos. Ginny will become a Ministry of Magic employee (Accidental Magic Recovery Squad). Harry will marry Ginny and Ron will marry Hermione.
Nithish R, Kerala

The last few lines of Book 7 will go like this: Professor Granger brings in the sorting hat for the first years to get sorted. Professor Potter watches while headmistress MacGonagal chats with professor Flitwick. It is the year that James Harry Potter enters the Hogwarts.
Jayaram, Pithapuram

Dumbledore, Sirius & Harry’s parents (their spirits) will be the deciding factor in the Harry v Voldemort battle. Voldemort will die, but there will be some change in Harry as well. Everyone else will be seriously wounded in the final battle. Neville will probably die. Snape will die by Voldemort’s hand. Malfoy will either join Harry or go into hiding. Hogwarts itself will barely survive the battle.
Truciet H Vora, Mumbai

Lord Voldemort can’t kill Harry because he made Harry his eighth and last Horcrux. That is why Harry has some of Voldemort’s powers. Now if Harry wants to kill Voldemort, he must kill himself. So in last chapter, I think Harry will kill himself.
Harpreet Singh, Punjab

In the last book, Ron and Hermione will die because of Voldemort. The Dark Lord will also kill Remus Lupin.
Dipak, Mumbai

Harry will overcome Voldemort with the help of Dumbledore (he will come back in the form of a spirit). Snape will turn out to be Dumbledore’s supporter. His hatred of Harry is justified as James Potter harassed him for no reason. Ron and Hermione will survive, become teachers and come to live at Hogwarts. The twins are killed. Harry tries to help Draco Malfoy, but Voldemort kills him. If Rowling kills Harry, then good will be defeated by evil and that is not a good moral.
Aruna, Bangalore

In the end, all characters from the wizarding world will forget that they were once wizards. They will live as normal human beings. Harry and Ginny will marry and have kids and in the end one of his kid will ask "Daddy, how did you get the scar?”
Rahaela, Karachi, Pakistan

Hermione gets the Minister of Magic's job and later marries Viktor Krum. Harry becomes the headmaster of Hogwarts. A year later, he marries Ginny. He is also the Defence Against the Dark Arts teacher. Ron becomes head of the Department of Magical Games and Sports.
Mittal Trivedi, West Covina, CA

In the last chapter of Harry Potter and the Deathly Hallows, the following incidents should occur:

1. Neville Longbottom should kill Bellatrix to avenge his parents.
   
2. Snape proves where his loyalty lies—he is sincere to Dumbledore and had killed the headmaster on his order.
   
3. In the last chapter, Harry hears why his eyes are like his mother’s.
   
4. The fight between Harry and Voldemort should take place in Godric Hollow or Hogwarts.
   
5. Harry will kill Voldemort to show that love triumphs in the end.
   
6. In the epilogue, Harry becomes an auror. He will be called the world's greatest after Dumbledore. Ron and Hermione will get together.