If you want to remain  unspoiled for the new X-Files movie, watching trailers probably isn’t a magnificent idea.  Otherwise, enjoy.
This was released in Russian earlier in the week, but we now have a good-quality English version without the subtitles.
Enjoy!

There have been bootlegs hanging around the place, but this is the first official release of the trailer, coming from IGN just after midnight on 12/05/2008.
You can see it embedded below.