Demon Hunters will be available on August 9, 2016! Anyone who pre-ordered Legion will be able to play the Demon Hunter on this day. The best thing is that you will be able to play the whole starting experience, your Demon Hunter will start at Level 98 and will reach 100 by the time you end with the starting zone quests. The only requirement is having a Level 70 character on your account. You will be even able to start a Garrison with your Demon Hunter. The only disadvantage is that Demon Hunters won't have access to talents and all the balance is focused at Level 110.
I will be writing a Demon Hunter guide for Legion exclusively for MMOSite.com soon so stay tuned for it. I will be covering both specs, Vengeance and Havoc, the guide will heavily focus on Legion content.
In the meantime, you can check our other articles that were written here that cover the pre-expansion patch including the demon invasions that start on the same date.