Some of you may already have read this, but I think this is the most details I've gotten on the project in one post...not sure if I should credit as it is from another site, but here you go...
" Hogwarts Express will be the real deal! The train stations include highly detailed scenery and effects. The trains themselves will be very realistic including steam wafting from each car, scenic treatment and sounds. Each interior cabin includes period props and treatments. The window in each cabin will utlize an advanced optics display making it appear as though you are looking outside a window. As the train travels to the station riders will be treated to different storylines depending on which station they are going to. The cabins are also equipped with a full effects package including heat blast, leg ticklers, lighting etc. One storyline includes a dementors attack where it will get dark, the air will go cold and lights will flicker among other things.
Make no mistake the connector train ride is a full E-ticket! The R&D for the display system alone is staggering. Nothing like this has been done before on this scale and it will be spectacular. Avatar looks to be a joke compared to just this attraction. I haven't even mentioned the major new ride for Potter 2.0 yet.
That brings me to Gringott's. The queue, in my opinion, will be even better than Forbidden Journey's queue. Let's put it this way...the queue includes a really cool elevator ride that will simulate moving vertically and horizontally. You'll feel the air coming from the right side as you move to the right and you'll feel the air from below as you travel down. Each of the two elevator simulators include a projection dome above to enhance the visuals. That's just in the queue. Maybe I'll save the actual ride description for another time but suffice it to say that everything from the unique ride system to the exciting show elements will make this attraction one of the most impressive rides to date. "