Dumbledore is standing in a King's Cross Station-like Limbo. Harry had just left to defeat Voldemort, and Dumbledore is preparing to pass on.
"Your time has not come Albus," a shockingly familiar voice says. Dumbledore turns around, and is shocked to see his sister. "Ariana," Dumbledore asks. The being wearing his sister's face shakes its head. "You will one day meet her again, but not today. You have one last adventure."
Dumbledore nods his head, trying not to meet his sister's eyes. "What is it," he asks. The being motions for him to fellow, and starts moving to a recently appeared train. "You are going to be reborn to fight an evil much more powerful than Tom Riddle," the being said. It helps Dumbledore onto the train, and closes it door. As Dumbledore falls asleep, he hears one last thing. "Good luck on your next great adventure."
When Dumbledore wakes up he is wrapped up in a blanket. He notices that his body is much smaller, and most likely very young. The sound of an engine is nearby. He feels a bump as whatever he is end most likely landed. He hears voices that he knows as Rubeus, Minerva, and his own. He deduced that he is in the body of Harry Potter. The meeting goes as he remembered till near the end. Where he remembered placing warming charms on Harry, he instead feels most of his magic being bound. And where he remembered wishing Harry good luck, he instead heard something that sent ice through his veins. "Sleep well my tool," his voice says sarcastically. For you see, Dumbledore has found the greater evil. Himself.
Canon Dumbledore has been reborn in the body of Harry Potter, in an evil Dumbledore world.
