I don't think a continuation, or even a reboot, is really possible anymore. The fundamental problem is that X-Files makes a hero of the Conspiracy Theorist, and we've now had 20 years or so of finding out just how gross conspiracy theorists actually are. If you try to just ignore this, you end up making something which looks like apologia, and if you don't, you have to rewrite a *lot*. Its just not worth it.