http://411mania.com/movies/the-comics-8-ball-top-8-worst-comic-book-film-deviations/

Just Missing The Cut

• Honorable Mention #1: Charles Xavier and Mystique were childhood friends, X-Men First Class
• Honorable Mention #2: Ms. Marvel-less Rogue, X-Men films.
• Honorable Mention #3: Catwoman with cat abilities, Catwoman.
• Honorable Mention #4: Superman costume is a Kryptonian suit, Man of Steel.
• Honorable Mention #5: Juggernaut the mutant, X-Men 3: The Last Stand.

#8: Bane, Poison Ivy’s Stooge
Batman & Robin

The Source: Bane is an Argentinean, cerebral villain who uses his intellect (he figures out Batman’s identity) as much as his venom augmented brawn to torment the caped crusader in the comic world.

The Film Deviation: This Bane is a complete and utter joke, utilized for the sake of creating another action figure to sell to the kiddies. Bane is portrayed as a mindless and dumb henchman of Poison Ivy with his developed comic persona all but removed. That is not Bane! The Bane most fan know is an intellectual and physical match for the Batman and Schumacher’s characterization was a complete insult to fans of the comic character.

#7: Villain-less Wanted
Wanted

The Source: Mark Millar’s brilliant mini features an amoral protagonist who discovers he is the heir to a career as a supervillain assassin in a world where the villains have taken control of the entire planet.

The Film Deviation: In the film not only are all of the members of the Fraternity endowed with the same power but we learn that they are really the good guys keeping the world in check through the power of the loom of fate. Millar’s comic was a smartly written take on what the world would be like without superheroes with fully realized characters not some cookie cutter assassins depicted here.

#6: Adamantium Stealing “Silver Samurai”
The Wolverine

The Source: Kenuichio Harada, the Silver Samurai, is a skilled mutant swordsman that is almost a match for Logan in hand to hand combat. He’s eager to inherit his father’s criminal empire, but it’s willed to his half-sister, Mariko Yashida, because he’s the Jon Snow of the mutantverse.

The Film Deviation: Harada’s namesake was given to a mysterious archer (wtf?) who gets used as first protector for Mariko and later red shirt fodder for the (shocking) reveal of the old man Silver Samurai. This deviation served to drag down the third act of a film that was on pace to be a real redemption from the first solo Wolverine film. (Yeah I said it.) They could have just completely adapted Chris Claremont-Frank Miller’s mini-series proper and had a critical and commercial hit. However the unneeded twist that neutered the Silver Samurai character tarnished what should have been a great final duel between Wolverine and Harada. Shame.

#5: Alfred’s Niece Batgirl
Batman & Robin

The Source: Barbara Gordon, the daughter of Commissioner James Gordon, had a lengthy career as a member of the Bat family in the guise of Batgirl, before a Joker bullet to the spine paralyzed her where she went on to be the intel muscle known as Oracle before being retconned as Batgirl again.

The Film Deviation: Leave it to Schumacher again who had a MUCH better backstory for Batgirl. Let’s make her the streetwise, street racing niece of Bruce Wayne’s butler, Alfred Pennyworth. That backstory added nothing to the film nor the mythos of the character as they haphazardly rushed developing her character and putting her in the Batsuit in one of the most groin inducing phrases ever, “suit me up Uncle Alfred.” Why would Alfred, not really knowing much about Barbara just happen to make a suit for her? Why would he think Batman would be cool with expanding the Bat roster when he was already having problems with Robin?::SIGH::

#4: Sandman Responsible for Uncle Ben’s Death
Spider-Man 3

The Source: In Amazing Fantasy #15, a very cocky and self absorbed Peter Parker allows a robber to make off with the wrestling promotion’s gate because he’s a star. This attitude comes back to bite him in the ass as he tracks down his beloved Uncle Ben’s killer and it’s revealed the murderer is that same robber. It was this tragic life lesson that fuels him to realize that with great power, comes great responsibility.

The Film Deviation: In the third film of Sam Raimi’s trilogy, the creative team had a major brain fart deciding to tinker with this long held canon and reveal Flint Marko aka the Sandman “accidentally” causing Uncle Ben’s death when his gun went off. The driving force for Spidey being Spidey is lost in Raimi’s (failed) attempt to do a film about forgiveness and redemption. Just No!!!

#3: Two-Face Killed Dick Grayson’s Parents
Batman Forever

The Source: In the comics we learned that Tony Zucco, a member of the Maroni family (depending on pre- or post-Crisis storytelling) killed the Flying Graysons as a show of power, leading Dick Grayson down a path toward crime fighting as a result.

The Film Deviation: I hated the Joker being revealed as the murderer of Bruce Wayne’s parents so I absolutely abhorred Two-Face being the one who kills Robin’s. It was another case of the writers cramming in unnecessary tension with a grossly underdeveloped Robin seeking revenge that never resonates with the audience

#2: The Merc without a Mouth
X-Men Origins: Wolverine

The Source: A disfigured and mentally unstable mercenary, Wade Wilson started off as villain but made a babyface turn and has fondly become the fourth wall breaking, “Merc with a Mouth”.

The Film Deviation: X-Men Origins: Wolverine got it half right with the casting of the snarky Ryan Reynolds. He’s had a number of roles that made me think he could pull off the comedic elements of Deadpool. Then FOX decided that instead of a wisecracking assassin, it would be best to reimagine Wade as a mute Frankenstein monster as William Strker tried to make the ultimate mutant killer, ‘Weapon XI’. Horrible. Has anyone figured out a plausible explanation as to how Deadpool could bend his arm with that ridiculous foot long blade sheathed in his arm yet?

#1: The Galactus Cloud of Doom
Fantastic Four 2

The Source: Galactus is one of the most powerful beings in the Marvel universe depicted as a god-like figure that feeds by draining living planets of their energy. He’s not so much a supervillain that maliciously destroys planets but a force of nature that needs to feed. If the Earth must die to fill his sustenance, so be it.

The Film Deviation: Leave it to FOX to ruin a great story in “The Galactus Trilogy”. Not only do we never see the classic portrayal of the character but our given a giant space cloud. Outside of the atrocious decision to design him as a non-humanoid we also got no dialogue from the character interacting with the Silver Surfer nor Reed Richard which was essential in portraying the character in comics and developing an understanding as well as fear for the stakes he brings to the FF.