Since You Been Gone

Harry thinks his lovers are dead after the Battle, he is attacked and nearly killed by those he should trust and he finds out Ginny and Molly are plotting towards him so he leaves the British Wizarding World. Now 11 years later a lot of kids come to Hogwarts looking like a Snape, Malfoy, Pucey, Zabini, Krum, and Weasley. Who are they? What will happen?