@Cassie_1247 oooh I will have to check that out!
I have a few ideas I’ll list below!
Hp x Marvel x PJO
OC is the daughter of Lily and Poseidon biologically but blood adopted by James and Tony. Shes the elder half sister to Harry and Percy, who are actually twins that were separated bc Lily wanted a son. (Lily can’t have kids after my OC and resents her for it). She gets sent away as a baby after a prophecy from PJO and hp that shows her either saving the world or tearing it apart. She is adopted by Tony after he finds her half dead. She is raised as a normal kid until her powers begin to grow and she gets a letter from not only Hogwarts but Camp Half-blood too. Not sure on who I want her with but definitely poly!
Hp x Marvel x TVD
OC is the biological daughter of Regulus and a female Tony stark. After the first war, Regulus gave his life to save his unborn daughters’. Tony, heartbroken, raises their daughter along with her brother in law Sirius and Remus Lupin. After the Potter’s die, they take in Harry and his twin sister Hera. Until they get their letters from Hogwarts. Everything gets turned upside down for the kids in this new world but they find their places. Until their worlds collide with the threat of Thanos and Voldemort. OC is able to save the world but at a cost, so when everything settles, she just wants a normal place to live. Unfortunately for her, she lands in Mystic Falls. Her soulmates would be the Mikaelson’s.