Well, in Europe anyway! Because as you can see below, Nintendo of Europe has just confirmed that the DLC pack can be purchased right now:
— Nintendo of Europe (@NintendoEurope) October 31, 2016
So if you want to play as Ravio or Yuga in Hyrule Warriors and live in Europe, now’s your chance. And if you don’t live there?
Well, sucks to be you I guess. Maybe you’ll get it a few days later, like how us Europeans are waiting longer for Pokemon Sun and Moon.