The Warhammer Community has released a new Battleplan + Artifacts, and compilation of rules into a single pdf download. Very much this is delivering on the concept of releasing an entire expansion worth of new rules for free.
via Warhammer Community
https://www.warhammer-community.com/2017/09/08/aos-monster-week-day-5-sep-8gw-homepage-post-4/
THE BEAST WARS
The Beast Wars saw the rise and fall of many monstrous creatures, from entities wise and noble despite their terrifying appearance, to fell behemoths of base intelligence that revelled in the wanton destruction left in their wake.
If you decide a battle is taking place in Ghur, the Realm of Beasts, then you can specify it is occurring during the Beast Wars. If your army has an allegiance and includes any Heroes, you can choose for one of them to bear a beastbane artefact instead of one of the artefacts of power that are normally available to them.
Finally, there’s yet another Battleplan for your games in the Realm of Beasts. In this battle, one player is a hunter and the other a beastmaster, designed to give flying units a particular edge.
https://whc-cdn.games-workshop.com/wp-content/uploads/2017/09/WarCom_AOS_Monsters_Day5.pdf
If you’ve been enjoying Monster Week, we’ve collected all the rules from the past 5 days into one downloadable PDF; it’s basically an expansion’s worth of content, for free!
https://whc-cdn.games-workshop.com/wp-content/uploads/2017/09/WarCom_AOS_Monsters_Combined.pdf