Magneto Plot Synopsis

An official synopsis of the movie Magneto, aka X-Men Origins: Magneto, has shown up via the Coventry Telegraph (here):

The original X-Men Origins film began with a prologue that showed the character as a child being led to a concentration camp by Nazis and that is the period in which the Magneto film will take place. This setup will allow a future villain to at least flirt with the designation of protagonist since the character will be seen almost exclusively in his formative years.
The storyline will heavily involve Professor X, the wheelchair-using X-Men leader. That character was a soldier in the allied force that liberated the concentration camps. The professor meets Magneto after the war and while they bond over the realization that they are alike in their special powers, their differences soon turn them into enemies.

Magneto in his ultimate quest for power will come to share the same kind of eugenic ideals that once brought the young Jewish boy he was to a Nazi death camp...

But this movie will probably focus longer on its formative years. When the anti-hero was not yet completely twisted by the hardship of his life.
8-!

Magneto Spin-off movie of the X-Men in 2009

Marvel wants to compound the succes of the X-Men movie series. Besides Wolverine whose movie is currently under production, the mutant juggernaut Magneto will also have his own feature film indeed. The Magneto film would actually be a prequel to the X-Men series:it would be a first look at the early life of Eric Lensherr and how he became Magneto.

The screenplay of Magneto has already been written by scriptwriter Sheldon Turner. And Direct David S. Goyer has been chosen for the movie.

The Movie production should as soon as the Wolverine movie is advanced enough to dedicate the energy to Magneto.

The plot of the Magneto movie:

A look at the early life of Eric Lensherr and his friendship with Charles Xavier, and how the one-time allies became mortal enemies, leading Eric Lensherr to become the juggernaut Magneto.

So Ian McKellen, the old Magneto in the X-Men movies, is unlikely to have the lead role: the movie will indeed focus on the life of the young Magneto. He may have some scenes though.

By the way there is a rumor on the web about a possible appearance of the Beast in the plot of Magneto.

Magneto is my favorite villain from Marvel's universe. Actually I don't consider him to be a villain at all: he is just a über-man with ideals. I have to admit though he is a bit crazy in his recurrent attempts at exterminating Mankind. But the guy is much more down to earth than Charles Xavier (who gets on my nerve, behaving like a sheep): Magneto is a hero with many facets! We'll have the occasion to discover them further. Stay tuned for the trailer of Magneto.
:)