X2, released in 2003, holds up as one of the best comic book adaptations ever made. After the Bryan Singer-directed hit wowed critics and audiences alike, its 2006 follow-up quickly became the most anticipated movie of that summer. Too bad Fox replaced Singer with glorified music video guru, and widely reviled hack, Brett Ratner.
The result was an incoherent B-movie filled with gaping plot holes, pointless character deaths, and way too much Halle Berry. The flash, style, and sophisticated storytelling of the first two flicks were killed off in favor of over-the-top action scenes and characters that were turned into bloated caricatures of themselves. That didn't stop X-Men: The Last Stand from making over $450 million worldwide, though. Way to go, folks!