worldofunderworld.com has been registered to The Sunday Club (UW management) since the end of 2016, so I guess they've been working on this for a while. Also, the seminar they gave at ADE in October was titled World of Underworld.
Regarding the magazine, there will probably be a podcast episode available for the issue within the next few weeks here:
https://soundcloud.com/electronicsoundmagazine/tracks