I feel like it could go either way with Diagon. The rumored original plot of land (SS34-44) will still be available for expansion even after Nintendo opens since Nintendo has moved. However, I do feel like a completely separate HP land would be too much for our little park. It's safe to assume we'll definitely see more Potter considering the consistent investment in our WWoHP with seasonal events and even new interactive wand spots that Orlando doesn't even get. To what extent is the big question.