Just saw this...
At New York Comic Con, ComicBook.com caught up with Star Trek: Discovery co-creator and executive producer Alex Kurtzman and asked if the experimental spore drive engine being tested on the USS Discovery, which makes the vessel capable of essentially teleporting through space, could be used as a means to set up classic Star Trek style plots involving time travel and parallel universes.
“Well, it sort of leaked that we are going to be doing some episodes about the mirror universe,” Kurtzman said. “And yes, we’re going to be paying homage to the original.”
When Kurtzman says that the information about the Mirror Universe appearing on Star Trek: Discovery “leaked,” he means that Jonathan Frakes, the former Star Trek: The Next Generation star who will direct an upcoming episode of Discovery, let the information slip during a Star Trek convention panel.
However, Frakes indicated that Star Trek: Discovery would have a single episode in its first season that involved the mirror universe. Kurtzman said they are doing “some episodes” about the mirror universe, suggesting that the mirror universe may be involved in an extended arc of Star Trek: Discovery.