A fox spokesman has chimed in saying that though there have been talks about a sequel, discussion of Gillian Anderson and David Duchovny’s return is not certain: “It’s not anywhere near that level yet.”
Spotnitz wrote the following on his blog a few weeks back:
Several people have e-mailed to ask about reports that the second “X-Files” feature is finally in the works. A script is indeed in development, but I’m afraid that’s all I can say. Thanks for your good wishes and support all these years.