As my DH just said while I am typing, I don't want to spoil anyones experience, so Warning the below contains a SPOILER if you don't want to know more about the actual tour. Stop now.

Ok, here is what our experience was...besides the 3 hour wait, inside the station, with strolling carolers... when we got to the train, we got to see the magical snow making outside. When we got to walk through the train, it housed the digital panels of video streaming of the making of the movie; some of the costumes; a few historical items, like the copies of the original play, with notes... old copies of the book a Christmas Carol. There was a room showing how they do 3D effects, and some of the scale models.
I must saw Jim Carey is a nut, the way he spoke of the movie making was funny. Lots of top notch stars and the new 3D effects will be cool in the movie theater. We exited the train to go to yet another line for the theater. (Much shorter line 30 minute wait.) When entering, we were provided the Disney 3D glasses - much like the ones for Bugs Life. We went into the inflatable, air conditioned, movie theater and got to view the preview. It was amazing. Worth the wait for us. Hope you all have as much fun! Oh --we took a few pictures, however we were told politely no pictures in the train. We have a few from outside the train and theater and the carolers, but that is about it.