Interesting idea. I love Harry Potter, but I don't think I would go to a movie marathon. That would be so long! I couldn't take it after awhile. They must be planning on having a meal or something, unless they expect all those people to survive on popcorn and soda for an entire day.

I don't know if they'll let people tape the new footage. It is a movie theater, after all, so you can't just bring in a camera. Video captured over a cell phone is bound to be pretty poor quality. Oh well. Here's hoping that someone gets a good tape of it!