Anon, the filming hasn’t started, it seems like the script of the first episode isn’t even finished yet, so don’t worry about anything like that. Although, you might get ready for a ride of all kind of theories. Everyone will be SURE Scully will get killed, Mulder will kill himself after he finds out, and David will be SURE they’re married. In the end, no one will know anything, and it’ll be just guessing, and we and David will be wrong about everything. Enjoy!