AU Summer before Fifth Year. A lone dementor succeeds in kissing Dudley. Through his guilt, Harry manages to attract the attention of muses, and is then pulled into an otherwordly plane where a war was being waged - Muses vs. Dementors.
AU Fourth Year. Something odd happened as Harry and Cedric were portkeyed to Little Hangleton. The Dark Lord rose once more, but he was not the only one who was had a rebirth. At least, not technically.
AU Summer before Fifth Year. Suppressed emotions and thoughts win over Harry as a needy voice inside his mind begged for the death of his relatives. He found himself very willing to oblige. Dumbledore discovers the Dursley corpses, and the mutilations.