Sorry, I see many people falling for this stupid misinformation that it needs to be cleared up.
Certain users are pushing "HIGH ISLE" as the next Zone. This is completely made up.
There is no "datamine", there is no source. Just because it's on a Wiki with poor quality control doesn't make it real.
Further
14 Locations within the Zone were added by a random IP address (now removed lol)
A certain Editor on the Fandom wiki is behind this misinformation, they tried adding it to UESP and got promptly removed due to editing standards.
Stop spreading fake news, I saw a bunch of people talking about le High Isle on Twitter and such. Gross