If you do not relate to the term "fanboy" or you have never found yourself foaming at the mouth over changes made to a series you’ve loved, then you do not know how furious it must have made Marvel Comics fans who went to see X-Men: The Last Stand. Now I see what all the negativity was about.
Now, for a couple-dozen minutes, it's all good: we all know Jean Grey (Famke Janssen) met her end in the last film, X2: X-Men United. We also know that Jean Grey returns; at least you have to know because she has a big role in the film. What happens after those 24 minutes or so is a warping and twisting of the X-Men canon that most fans of the Marvel Comics series would retch at the sight of. It's not to say that these major plot points will anger people who have never picked up an X-Men title. The Last Stand is a solid film on its own, but it really shreds and fiddles with what we X-fans all know about our favorite mutants.
The film begins two decades before the present time, when Professor Xavier (Patrick Stewart) and Erick Lensherr (Ian McKellen), the future villain Magneto, go to recruit a young Jean Grey for Xavier's School for Gifted Youngsters. This is an important moment in the history of the X-Men because Jean Grey's mutant ability is telepathy and her power has a potential that Xavier saw and wanted to help mold. While a young Jean Grey saw the benefit to her mutation, a young Warren Worthington III (10 years later) does not find his angelic wings to be a blessing, but a curse.
This sets the scene for the two major plot points, the return of Jean Grey and the discovery of a "cure" for all mutant-kind. Word of this cure first reaches the hands of a mutant named Beast (Kelsey Grammer) who is a member of the government's mutant affairs division. Beast is friends with Xavier, so he gives him warning about this cure. While Xavier does oppose this new creation by Worthington Labs, he is not willing to take matters into his own hands through violence. His old comrade Magneto, on the other hand, is more than willing to kill anyone, mutant or human, who gets in the way of him and the newly expanded Brotherhood destroying this "cure."
This is where things get hinky for people who know and love the X-Men series. Without giving out any spoilers, all I can say is that things happen that aren't supposed to according to X-Men history. There are also certain people who show up where they don't exactly belong and finally, the Juggernaut's (Vinnie Jones) history is totally turned on its head. This is the only bit of info I can expose without spoiling it for any potential viewers.