So here's my idea. Alfred Pennyworth is Lily's maternal uncle and she asked him to take care of Harry as she didn't trust Dumbledore to follow their wills. Alfred responds to Lily's quest and Harry is raised with the Waynes and is loved for eight or nine years before they are gunned down in front of Harry and Bruce (Bruce can be the younger or older brother, whichever you prefer). Bruce leaves on his training trip while Harry goes to Hogwarts. However, when Harry is abused throughout his years in Hogwarts and he loses the family that he made in the magical world he is close to snapping and when Luna (best friend or lover) by Voldemort himself, he snaps and his mind has two personalities in it now. Harry returns to Gotham around the same time as Bruce and for a few months he is fine and simply suffers from nightmares and PTSD. One night when he falls asleep his other personality takes over and the Joker is born. In the morning, Harry takes back control of his body and discovers nothing wrong. This continues until the Joker's first crime and is stopped by Batman. Harry uses his magic to escape Arkham and the career of the Clown Prince of Crime is born. After that it is up to the writer, but I would love to see Joker with a harem since Harry would stay away from women to not be like Bruce. Does Bruce figure this out? Does Alfred? Does Harry discover his alternate personality and is he okay with it? Let me know if you want to take this up.

A/N: No sure how to declare a challenge so I'm trying a few different things. As always if you want to roll with any of my stories just PM me so I know to look for it.