Will probably be some WotG progression as it says you need WotG installed and the only areas that have been shown are highlands, la Theine and Tahrongi. There could always be some WotG ares too but im guessing a minimal ammount of progress...
I was looking at walk of echos thinking you would need some major progress in WotG to get there... SE puts out the info, you get acess after mission 3 lol. In addition it functions similar to campaign which im sure is a let down for alot of people forming LSs for it.
Anyways im thinking it will be the same ammount... that or Distorter of time cleared might make some sense.