Many movies have action that takes place in Washington D.C. - it's a great way to show how severe a situation is, and the upcoming Transformers: Revenge of the Fallen is one of the films that is currently seeking approval to film in the city. An article by Politico.com which lists films seeking approval reveals an interesting fact however - apparently Fox is still moving forward with plans for the production of X-Men Origins: Magneto.
X-Men Origins: Magneto is listed among a series of films that are seeking approval for filming through the city's Office of Motion Picture and TV Development. Other movies that are mentioned in the list include Our Brand is Crisis, W, Lincoln, Transformers: Revenge of the Fallen, Farragut North and First Man.
X-Men Origins: Magneto will follow the trend set by X-Men Origins: Wolverine, and focus on the lives of the character before the events of the three X-Men movies. At this time, no cast or production team has been set.