This basically comes about because the fans did what Twilight fans did back in the day and had fan favorite actors picked among themselves and are now pissed that they didn't get them. Fans are now demanding that Hunnam and Johnson are dropped and they be replaced by Matt Bomer and Alexis Bledel. Aside from Bomer, fan favorites for Christian Grey include Henry Cavill and Ian Somerholder.
Universal has bit back at the fan protest stating via Twitter that more goes into casting a motion picture than appearance. Co-producer Dana Brunetti tweeted,
"There is a lot that goes into casting that isn’t just looks. Talent, availability, their desire to do it, chemistry with other actor, etc. So if your favorite wasn't cast, then it is most likely due to something on that list. Keep that in mind while hating and keep perspective.”The book's author, EL James, has apparently said she didn't get her casting choice. She was pushing for Robert Pattinson as Christian and that didn't happen. Fans are using that to fuel this fire and say the studio is inconsiderate of the woman who gave them the source material. People are not bearing in mind that James is a producer on this film and she would have had a lot of input on the casting and was no doubt present for the screen tests. Plus, the Robert Pattinson claim is from some guy who claims she said it at a party this summer.
Look... to put it bluntly, the average moviegoer doesn't know jack shit about the inner workings of making a movie and this proves it. People get so blinded by fanboy tendencies that they personally attack the studios for casting certain people against the populous. I will admit that I have fangirl moments and can get mad at casting, but when it comes down to it, I know movie casting isn't up to what people think. A prime example would be Ben Affleck's casting as Batman. Not to mention the initial backlash over the casting of Robert Pattinson and Kristen Stewart in Twilight. People hated the fact that they were cast and they became worldwide superstars after the first movie was released. Kristen Stewart even went on to become the highest paid actress in Hollywood.
People need to calm down and stop signing petitions that won't do anything. A studio won't drop an actor because the general populous says they don't like it. If that were the case Ben Affleck would have been dropped as Batman that next day.
Just more proof of the kinds of people that like these shitty book series.