The last time Disney went for "more thrill" they ended up creating.... Mission: vomit.
So don't bet on "Avatar" being a wild simulator that makes you feel like you're pulling three Gs and going through inversions. Best bet is still this will be a Soarin clone that may jerk you around a little bit more and it will be interesting to see if they just end up replicating the type of experience
you already get in many parts of HP Forbidden Journey (high speed flight that zigs, zags and swoops through towering landscapes).
In fact, now that I think of it, comparisons to Potter may include the observation that HP is better because you don't have the head and wings of some imaginary creature obscuring your view during your ride.