Since CoS mentioned here. I just hope in the future they will shift to an "underground" set,
that will connect to Hogwarts current build to make a complete castle display like D2C set
We can have CoS under the Great hall, Philosopher stone challenge under the Clock tower of example
another set could be Slytherin common room, Snape's classrom
but the problem is the display side of the set will be an only stone wall and hill,
seem to be a hard sell for kids.