In the latest issue of TVGuide US, David Duchovny in a Q&A about his returning show Aquarius was asked about the possibility of FOX continuing THE X-FILES, this is what he had to say on it.
You had great ratings success last winter with Fox’s X-Files reboot. Any plans to get back together with creator Chris Carter and costar Gillian Anderson for more?
We are talking about it, and like before, it’s a matter of getting the three principal people in the same room for a significant amount of time to shoot it. Last time, it obviously took nearly 10 years [to get us all together again], so hopefully it won’t take that long. And I think there were too few episodes. Twenty-two is far too many, but six is too few, so we’ve got to figure out something right in between.
SOURCE: TVGUIDE US 06 JUNE 2016