The Mummy : Tomb of the Dragon Emperor. Now, I did enjoy the first two Mummy films (yeh, you heard me), but seriously this? Even ignoring the fact that it didn't have any actual freaking mummies in, there was the fact that the little brat kid from the second film was now, what, maybe around 10 years younger than his dad?
Then at the end of the film, we find out that somehow, "mummies" have been spotted in Peru (was it Peru? I don't recall). Ok, maybe my history, but I didn't know they also preserved their dead in a similar way to the Egyptians there as well. Perhaps, in the fifth film we'll have American Mummies....or French Mummies...Latvian Mummies, even? Hell, I might actually run with this...!