Harry is in the future and has magic, but doesn't have a wand. Voldemort is alive and was being experimented on. The magic population was wiped out by either the Muggles or Voldemort. The Muggles experimented on him and created some soldiers based on his DNA or something. A descendant of Severus Snape is in the story. Harry finally finds a wand and some other wizard stuff some time in the future of the fic. I think it might be a Firefly crossover, but I can't be sure.