Of all the Marvel comics movies to come out so far, I think this one has the greatest potential capacity to be a huge damn mess. It just seems like there's so many things that can go wrong with trying to take a character like this and translate him to the live-action world.
Done right, and it could be a low-end LOTR sort of affair. If it's not done right, I could honestly see this being worse than Ghost Rider or either of The Fantastic Four movies.
It just seems like there's such a thin line in this one between kick-ass fantasy and high-budget camp.