As Harry is Lord Black, Harry needs to nulify both Narcissa Malfoy's, & Bellatrix LeStrange's marages, as well as disowned them from the Black family, as well as the getting the dowries returned to the Black family, as well as bringing Tonks and her parents back into The Black Family.
As Harry is heir of at least two of the Hogwarts Founders (or should be), Harry owns Hogwarts, he needs to NOT allow anyone who has the Dark Mark to ever enter Hogwarts or any one who created the Dark Mark, or anyone that means harm to the students at Hogwarts, to ever enter Hogwarts!!!
Author's response
There are many other fics where all of those things happen. This story is marked FIN at the end of chapter 27. It is finished. Thank you for your review.