I just finished watching this movie on BD. I can say it was much better than I expected, unfortunately I wasn't expecting much and not much is about what I got. I initially thought the trouble with it was the overuse of CGI, or the subplots that weren't explained and/or made little sense (like the kung fu warriors in the graveyard). A lot of scenes seemed to me to just be thrown in for no particular reason, almost as if the glue that held them together had ended up on the cutting room floor.
The story itself wasn't so awful, even with the aliens and all. It just never seemed to meld into something where I got caught up in and cared about the story. In short, it was very flat. That charm from the original movies wasn't there at all. And that charm was the magic ingredient that let you forgive the makers from crossing into fantasy land and still made the movies fun and enjoyable to watch. It's unfortunate because I really felt this movie had the potential to be great.
Jack