Due to the prone body position, a launch on a flying coaster would be pretty uncomfortable - hence it not being done yet... Also, flyers are notoriously B&M's floaty-est, most drawn-out, lowest-G (pretzel loop excluded) ride type. I'd be very interested to see how one worked as a compact indoor ride with tighter elements.
This would be pretty cool though. It'd be neat to have the only two launched B&Ms in the world right next to each other, and I dig the cartoon aesthetic used in Spiderman, Hulk and Dr Doom so I'd be happier with this than a modern Downey Jr version of anything at Disney.
I wonder how this will go down given Disney's intentions to do a Star Tours - style Iron Man ride in the Far East though?