First of all I'm curious about what setting they go with this time. Hope they improve on the things the first game did poorly like the sleeper story, and the repetitive enemies and insipid characters.
I think they should take elements from persona games and actually make you attend class and write exams. Having a personal house elf that you can order around would be fun mechanic.
There's only one castle to work with every time so I don't know how they'll make exploring it interesting everytime. But the puzzles and exploration was super fun in the first game so I trust them on that.
Will wait for trailers and other info before deciding on playing this.