"The X-Files" is known for ending the seasons on a cliffhanger and
Season 10 was also concluded with several elements left open that has
created a speculation among the fans that the show might return for more
seasons.
There were several Easter eggs in the season finale of "The X-Files"
Season 10 titled "My Struggle II" that might hint at a possible eleventh
season including the fate of Mulder and Scully's estranged son, William
and the mystery behind Scully-Mulder doppelgänger.
At the end of the episodes, while both Mulder and Scully were trying
their best to stop a Syndicate-sponsored pandemic, a strange UFO
appeared over Washington D.C. and engulfed them in a bright light before
the episode cut to black that left the viewers confused regarding the
fate of the show.
The Hollywood Reporter marks that
the lack of a definite ending, the interest of the creator, actors,
network and studio to keep the show alive, and the good ratings might
lead the show-runners to consider coming out with more seasons soon.