Thanks to some digging by Twitter user Timur222, it seems that The Elder Scrolls VI is still in the pre-production stages. This is due to this person doing some digging on LinkedIn and came across the profile of Fanny Manset who is in charge of Talent Acquisition and HG Generalist at Bethesda. Under her Experience section is notes that Bethesda are in full-production mode on Starfield and “pre-production on the highly-anticipated The Elder Scrolls VI.”
Many believe this is just the case of the development team focusing entirely on Starfield which launches on November 11 only to start on The Elder Scrolls VI shortly thereafter.
The Elder Scrolls VI was first announced at E3 2018 during E3 2018 Press Conference.