Don't overthink this. There's loads of gaping plot holes and a lack of logic. What makes this movie fun, and I do feel it IS fun, is that it just doesn't let up. Not for a minute. There are a number of tidbits built in to titillate the long-time fan, including classic lines given in surprising ways. I do feel it's worth seeing. Oh, and we saw it 2D. There's lots of places where the film has things flying by, and I suppose that would look cool in 3D, but it doesn't really add all that much to the film, IMHO.
So? Go see it. Tell me what you think.