X-Men: First Class is looking like it will be a pretty good movie at the moment, but it won't be perfect because it shouldn't be a prequel, it should be a re-boot.
The re-boot would scrap the original 3 x-men films and the wolverine origins one and start over. it would feature the original 6 x-men as the main protaganists:
Professor X: The X-Men's leader and mentor, Charles Xavier is a powerful telepath and is possibly the most powerful person on the planet at this point mentally but physically he is confined to a wheelchair. he has founded Xavier's school for gifted students as a safe haven for mutants. He currently has five students.
Cyclops: Scott Summers is the first X-Man and the X-Men's field commander (as, due to his wheelchair, Xavier wouldn't be much use on the battlefield). He can shoot optic blasts from his eyes however, due to a plane crash his mind was slightly damaged and he cannot, nor will he ever be able to, control the them. Scott is a tall slim teenager and rather shy, his tactical skills are exceptional. He has a huge crush on Jean Grey but is too afraid to say so.
Iceman: Bobby Drake is the youngest of the X-Men. He has the power of Ice, he is made of Ice and can throw Ice and freeze things. He is also a practical joker but has a habit of taking jokes a little bit too far. He is annoying and enjoys it, he especially enjoys annoying Beast.
Angel: Warren Worthington III is the son of a rich multi-billionaire and has access to his father's money. at first he was ashamed of the massive white wings that grew on his back but has since learned to accept them. deciding to use his powers for the greater good he became the superhero known as "The Avenging Angel" until he met Professor X and agreed to join the X-Men.
Beast: A scientific genius, Hank McCoy has enlarged hands and feet and super-agility. He was bullied because of his hands and feet and his inteligence. He quickly agreed to become a member of the X-Men. Towards the end of the film, but before the final battle, Hank starts to grow blue / grey fur.
Marvel Girl: Jean Grey is a gifted telepath and telekinetic. one day she will be even more powerful than Professor X but at the moment is still having difficulty controlling her mutant abilities. She hasn't told anyone yet but she sometimes hears the voice of a phoenix who speaks in Latin and has come to purify the world. She loves Scott but is waiting for Cyclops to suck up the courage to tell her he loves her. This happens towards the end of the film.
The Antaganists would be:
The Sentinels: An army of giant purple robots created by Bolivar Trask and in use by the government, They are programmed to track down mutants and capture them, once captured, they will be taken to a government holding facility known as the Triskelion. They are authorised to kill any mutant that retaliates.
Bolivar Trask: The creator of the sentinels, Bolivar is obsessed with defeating "the mutant plague" as his son was killed in a mutant terrorist attack by Black-Tom Cassidy. Bolivar is close friends with Senator Kelly.
Senator Robert Kelly: A Senator, Robert Kelly feels strongly that mutants are a threat that must be dealt with swiftly. approving Bolivar Trask's Sentinel program, Kelly is the spearhead of anti-mutant propaganda.
Black-Tom Cassidy: A mutant with the ability to shoot heatballs from his hands, Tom Cassidy has chosen the career of a terrorist in an attempt to gain money and get revenge on all the humans who have mistreated him over the years. among the casualties of his attack is Bolivar Trask's son. Tom is defeated by the X-Men and imprisoned on the Triskelion by the government.
Main Cast:
Professor X - Liam Neeson
Cyclops - Chris Pine
Iceman - Josh Hutcherson
Angel - Teddy Sears
Beast - Jon Hamm
Marvel Girl - Karen Gillan
Other Notes:
Xavier would try to recruit Emma Frost to the X-Men after Cyclops but before Iceman. Emma turned down his offer.
On the Triskelion cameos would be made from: Banshee, Pyro, Changeling and Mystique.
Havok would make a cameo in a flashback from Scott of him and Havok jumping from the aeroplane
Magneto would appear as Erik Lenshirr in founding the X-Men at the start with Charles Xavier but would leave before the X-Men started recruiting due to a disagreement with Charles as to the X-Men's purpose. He states he will make "the real X-Men" who will fight AGAINST Humans not FOR them. He is not seen again in this movie
A sequel will follow