Source: cinemablend.com

9. Weapon 11 Introduction (X-Men Origins: Wolverine)

I'm sure some of you got momentarily panicked upon seeing Deadpool, but rest assured, I have no issue with the 2016 film. It's good! That cannot be said, however, of the 2009 film in which Wade Wilson made his cinematic debut.

X-Men Origins: Wolverine is no one's favorite X-Men movie. In fact, it’s most people's least favorite X-Men movie. And its treatment of Deadpool is no small reason for that.

The film did make the brilliant move of casting Ryan Reynolds as Wade Wilson, and his first big scene is arguably the best scene in the movie. The elevator scene is good. But toward the end of the film, Wade is taken in, and they operate on him to turn him into Weapon 11. Part of that includes sewing his mouth shut. This is a bad call.

For taking the best part of your movie and turning it into the worst, the Weapon 11 introduction makes this list.