Djunknown, thanks for the comments. I don't think you should wait for a Marvel: UA sequel; unless they completely change the game design itself, it's probably going to adopt the same or only slightly enhanced control scheme on Wii. There's probably no other way to do it except to enable Classic Controller support (which I would be fine with...).
The issue is not really that Marvel: UA's Wii controls are designed poorly, it's that the game itself is inherently a bad fit for the Wii controller. There are way too many functions to map to the existing buttons, and if those functions had simply been left out, the game would be crippled. The developer had no choice but to use gestures for some moves, but due to the variety of superhero powers, it would have been insane to map a unique gesture to each move. (Supposedly they tried this at one point and it was impossible to keep track of all the gestures.) So boiling everything down to five simple gestures made the game playable, but in most cases it eliminated any correspondence between the gesture and the subsequent move performed.