Massive theater = we rightfully can set our expectation using Soarin' as the mental example we can set.
Vehicles moving/animatronic banshee = while we may want to set our expectations at climbing on top of our own beast and flying away, there is no practical way from a capacity perspective to expect 1:1 banshees. Granted, we know that there are 4 theaters and multiple loading levels inside of it; but, I don't think we should expect the "Bob Iger Experience" of climbing up on our own dragon. Also, how would that work from an ADA perspective is beyond me. The restraint mechanism alone for individual banshees suspended in front a screen would be quite a challenge even without ADA concerns. Of course, they could take the Nemo Sub route and make a separate viewing booth for ADA; but, the leaked plans showed disability access going into the main theater (likely the ground floor), so maybe it would be non-motion only viewing.
I still believe that this is the RV system that will be used:
http://www.vekoma.com/index.php/specialities-and-attractions/panoramic-flight-simulator
Now, if they do want to take Vekoma's RV and change the seating so that instead of 4 seat benches it has 4 banshee saddles on small creatures, I guess they could cannibalize the restraint system used by their MotoCoaster cars. It's kind of a clamshell that closes on your back and causes the rider to lean forward into the chassis.
We should be happy at least it isn't a hub and spoke spinner like Dumbo in a movie theater at least.