I dunno, with theme parks future expansions have a tendency to change or be severely heavily delayed. Just look how long it took Epcot to open most of the countries and all the changes that took place and deals that were entered and backed out of. The DK area could just wind up being a small subset like a ride or two and not a full blown expansion.The DK area wasn't cut, it's going to be a future expansion. They're just rolling out the Mario stuff to start with.
Harry Potter still isn't a full day park like it was originally intended, you still just spend a few hours there before you've done everything.