User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20181005021240

So Arch-Tempered Zorah Magdaros comes out on 10/18 - 11/1, literally after Arch-Tempered Lunastra. Defeating it grants you tickets to make its set as well as a layered version of the Origin armor (Classic Hunter's armor).

http://game.capcom.com/world/us/schedule.html