The soul piece that remained in Voldemort was atleast as stunted, if not more. Rest of his soul had already been killed and moved on. There wasn't enough of it left in him to return as an imprint upon the earth. Hence, he couldn't come back as a ghost.
Rowling stated that after his death, Voldemort is forced to exist in the stunted infant-like form that Harry sees in the King's Cross-like limbo after his confrontation with Voldemort in the Forbidden Forest. Rowling also mentioned that, despite his extreme fear of death, he cannot become a ghost.
The book depicts Voldemort's body as being intact after his death. In Harry Potter and the Deathly Hallows: Part 2, Voldemort's body is depicted as disintegrating, omitting the chamber's mention and purpose completely.
Since he died, the only possible way for him to even remotely "come back" is through the Resurrection Stone. But since Voldemort has a mutilated soul that has never fully moved on, it is most likely impossible.
The potion and its associated rituals were able to create a rudimentary body for Lord Voldemort's disembodied soul-fragment to be directly transferred into.
Harry Potter Theory: Why Didn’t Voldemort Return As A Ghost?
Why does Dumbledore call Voldemort Tom?
Why does Dumbledore, enigmatic headmaster of Hogwarts, address the sinister Voldemort w/ that invocation? Tom is the muggle name Voldemort was given. His actual official name given to him by his mother was Tom Marvolo Riddle. For Voldemort, this name forever reminds him that he is not a pureblood.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
How did Harry survive Avada Kedavra the second time?
Harry survived Avada Kedavra multiple times due to the protection of Lily's sacrifice and the love-based magic that surrounded him. The Elder Wand, which Harry mastered, protected him during the Battle of Hogwarts and prevented Avada Kedavra from killing him.
Voldemort lost his physical form and magical powers, but he remained alive in ghostly form. The Horcruxes he had created kept his spirit bound to the physical world.
Pettigrew mixed up a potion for Voldemort using unicorn blood and the venom of Nagini. With this potion, they were able to create a new body for Lord Voldemort to finally return to. However, this body was not what Voldemort needed to return to his fearful leadership form. Instead, it was that of a scaly, hairless baby.
Why Did Voldemort's Appearance Change? Tom's journey to immortality continued as he sought the horcruxes to spread his everlasting soul across the world. As a result, his soul was continually breaking, but so was the body that it once inhabited.
During his final confrontation with Voldemort, Harry knew that he (Harry) was the Elder Wand's true master. He again cast Expelliarmus, ejecting the wand from Voldemort's hand into his own as the Killing Curse rebounded off his body, fatally striking Voldemort.
Voldemort's body was removed from the Great Hall and placed in another room, while his soul was trapped in limbo in a stunted form, never to return nor move on.
Due to the immense fear that Voldemort commanded and the threat he posed against wizarding Britain, Minister Fudge adamantly refused to believe that he had returned and instead deluded himself into believing a more comforting nonsensical scenario, that Dumbledore was trying to usurp his position of Minister for Magic.
An ancient piece of dark magic, Voldemort's regeneration potion restored the wizard to a true and whole bodily form. The ingredients used were typical of very dark magic and included the bones of Voldemort's father, flesh from Wormtail, his servant and blood from his enemy - Harry Potter.
Harry Potter had a few love interests during his time at Hogwarts. Though he eventually settled down with Ginny Weasley, he also had a thing for Cho Chang in his earlier school years. Then, of course, there's his secret love for Draco Malfoy… Wait, what?
In the books, Pansy Parkinson has a schoolgirl crush on Draco, and they went together to the Yule Ball. However, there was no true love between them. In the Cursed Child, Draco Malfoy's wife is Astoria Greengrass.
J.K. Rowling says Draco doesn't have a patronus because he never learned the spell but I think it's because he doesn't have any powerful happy memories to use.
The Killing Curse was created in the early Middle Ages by Dark witches and wizards. Primarily, the curse was used to quickly slay opponents during a duel. In 1707, the Wizards' Council was restructured into the Ministry of Magic, which allowed for more strict restrictions on certain types of magic.
Simple answer is, that's only in the movies. They often play fast and loose with things that might look or sound cool in the moment but make no sense in the overarching story. Ron never casts Avada Kedavra at Nagini in the books.
A Horcrux is an item that contains a soul piece, not the soul piece itself. There is no Horcrux in Harry, Harry is the Horcrux. Harry survived because Voldemort took his blood in GoF. His blood contains Lily's Sacrificial Protection.
While most fans agree that Harry is the unrefuted Chosen One, the final Deathly Hallows film (in particular) sways heavily toward highlighting a heroic Neville, revitalizing the debate regarding which boy is better suited for the iconic title. "The one with the power to vanquish the Dark Lord approaches ...
Dumbledore knew about Horcruxes. He knew how they were formed, what happened after that, etc. He probably got to know Harry was a Horcrux when he saw the Scar on Harry's forehead, but maybe he wasn't sure.
In the Harry Potter and the Deathly Hallows movie, Snape showed how much he loved Harry, providing him with his memories and showing that he saw Lily in him, his last words echoing this: "You have your mother's eyes."
