So, I guess this might have been a blink-and-miss-it sort of moment, but it seems like Acherus will be coming to the new continent, as seen on the screenshot I took from the gamescom presentation of the zones here
It's also visible at just over 45 minutes into this video: https://www.youtube.com/watch?v=e1WIEl4hRvA which is the video of the entire announcement