So the things to avoid if you are trying to be surprised at the show are videos from the gigs depicting the visuals. You know, video of the wall crashing to the ground at the end of the show etc.
If you want to remain in the dark about what you may see at the show DO NOT watch the below two videos from Roger's site. There are loads and loads of spoilers and I am kind of sorry I watched them. But with my memory, come December when I see the shows I won't recall any of this anyway. Suffice it to say the production looks incredible. No. FUCKING incredible. I have tickets to the 12/6 show and will almost certainly try and score one for 12/8. This is a once in a lifetime, must see event.
Some fan observations and video from opening night: