Unless the actual movie is not up to the trailers I think this movie's gonna kick some box office but -- might be the top earner of the year. There's a lot of buzz for it with almost all of it positive and having Walter White isn't going to hurt either. Saw a post on youtube from a woman saying she can't wait to take her kids to see it ... how often do you see women chiming in like that for a movie like this. The interesting thing is that this movie is by all account a crap load darker than all but the original 1954 movie so maybe the mom will have some scared kids -- not that there's anything wrong with that!
Most blockbuster action movies cater to the younger audience because there the ones that go to the movies most of the time and this movie looks to have a good shot a drawing them in, but in addition, there will be a bunch of older folks that grew up with Godzilla that will go when they might otherwise not.
Brian