Well, my naming of Whedon and Burton was my way of comparing Whedon's The Avengers to the Burton Batman movies in terms of their successful and unsuccessful handling of the subject matter. Choose any genre, and there are samples of good and bad handling that make the difference... Hill Street Blues vs T.J. Hooker... Titanic vs. The Poseidon Adventure. The point is just that any subject needs proper handling. And I'd say that steampunk hasn't been handed to the right person/production team to do it right (with a possible exception, mentioned below). As I said above, I think SP is viable as an SFF hybrid, if given the proper material and production team. Another example of steampunk-esque tech would be the Hellboy movies, which have been much more successful than the other movies mentioned, but are so filled with fantasy elements that I think they overwhelm the steampunk elements in most viewers' minds. Still, those elements are clearly there, and they work.