Here's a recent X-Files article: http://tv.msn.com/tv/article.aspx?news=3
Here's a piece of it:
"While this is not a mythology movie, it's true to everything that's come before," Spotnitz said at the William S. Paley Television Festival. "It's true to Mulder and Scully, who they are and where they would be this point in their lives and all of the experiences that they've had."
Carter, who also directs the new movie, said it takes place in the present and uses a story envisioned when the series ended. While the show's sprawling alien mythology isn't part of the plot, Carter said there is a reference to Scully's seemingly supernatural son, William, who was born in season eight and later given up for adoption.
The film is due out July 25.
Carter was tightlipped about the title.