10. X-Men III: Last Stand

The X-Men movies all did very well at the box office, but that may have had more to do with Wolverine's fan following than the plot and the writing.  Of all the X-Men movies, this one went the farthest off the rails.  

Jean Grey rips Xavier to shreds with her mind, Angel makes an appearance for no apparent reason and there are more unknown, unnamed mutants running around on the screen than anyone can possibly keep up with.  The president of the United States decides to commit genocide without much thought and Magneto turns on Mystique.  Wow.

That is just a sampling of the disjointed affair that becomes the third installment of the X-Men's first go around. The final scene in which Wolverine somehow stands up to the Phoenix is dramatic and heartfelt, but only if you have totally abandoned yourself to the experience and forgotten all about any comic book storylines.  I'm a fan, but the movie simply should have been better.