There are TONS of themed sets and practical effects that will take place. The minute you go through those gates, you will put the glasses on, and have a bit of difficulty telling what is real and what is 3D. Should all blend together.
Oh, and in case it hasn't been mentioned yet, the sets are finished. The screens should have gone up in the last few weeks or are in the process. The only thing that is a wee bit behind schedule is the queue building interior on the right of it all.