In spite of the commercial failure of The X-Files: I Want to Believe, producer and screen writer Frank Spotnitz said that a third and final film is definately something he'd be keen to do.
If a third X-Files movie is done, it would focus on the symbolic date of December 2012, when an alien colonization would happen.
The exploitation of the 2012 date by Roland Emmerich in his 2012 movie coming next year is not a problem for Spotnitz, as they would be completely different films.
The X Files: I Want to Believe is the second movie from The X-Files franchise starring David Duchovny as FBI agent Fox Mulder, and Gillian Anderson as Dana Scully. Released in July, and with the a budget of $30 million, it has earned an estimated $21 million in the USA.
Spotnitz said everyone involved in The X-Files franchise is awaiting the results of the DVD and Blu-Ray releases of The X Files: I Want to Believe to decide on the future of the franchise.
So you know what to do if you want to see the epilogue!