I would think Escape from Gringots would be a prime example of what to expect with regards to the queue of Flight of Passage. Not specifically with regards to the themeing or the "show" elements, but with regards to the fact that the majority of the last 15-20 minutes or so of the "queue" blurs the line between waiting in line and already being "on" the attraction. In fact, as much as it would feel like a rip-off of Universal, an artificial elevator type scene could actually be quite appropriate in making you feel like you are ascending to the top of one of the floating islands to board the banshee.... it will be interesting to see what sort of elements they incorporate into the queue...