The Untamed Expansion Pack is available for pre-ordering in Steem Monsters website, and 42909 packs are already sold:
The new pack will feature 70 new cards, and the presales will end in November. Till then, every 100000 packs sold will unlock a new card which will be airdrop to the players that already purchase packs.
I bought my first 100 Untamed packs, and I expect the first airdrops already this weekend...