There are practically innumerable directions a Hogwarts Legacy sequel could take at this point. It makes sense to build from the foundations of Hogwarts Legacy as an IP rather than begin a new franchise with its own title, anyway, and such a sequel could still be as unique and unaffected by Hogwarts Legacy if that’s the case. Because Hogwarts Legacy has a customizable protagonist it seems unlikely that they’ll be reprised for a sequel unless somehow players’ save data can also transfer over to keep their desired avatars, but having a new protagonist doesn’t mean they need to start from scratch, either.