I understand that any ride placed in Tomorrowland ought to be futuristic, and that Stark Expo creates a reasonable facade for that. But why base the ride inside on only Iron Man instead of on the massively popular film that combines his story with other heroes', creating the most lucrative movie Disney has ever released?
In terms of immersive-yet-thrilling dark ride, I imagine the Marvel attraction borrowing elements of Universal's Spider-Man / Transformers motion-based dark-ride simulator, KUKA arm, or other advanced technological marvel that can interact with projections, sets, and tactile effects (and indeed, I imagine that would be the best way to go with a superhero platform). But any and all of them seem like they could benefit massively from featuring the entire Avengers cast and not just one hero. That's like making a multi-million dollar Green Lantern ride when you have the rights to use the whole Justice League.
So, yes, I get it. Iron Man is a successful franchise separate from the Avengers. But to me, a truly "epic," oversized, adventurous journey with the whole team of heroes would be much more exciting than following just one.
Of course, nothing's been announced and some people are already against the very idea. But assuming you would have to have one or the other, which would you prefer to have housed inside Stark Expo: Iron Man, or the Avengers?