Except the update also says right at the beginning:
This month, we're releasing the Abydon and Skaen challenges in Patch 2.1, a Mega Boss for those who adhere to the "get good" philosophy, and an entire DLC focused around proving your worth through glorious combat.
The three things we should see in the next few weeks are:
- "Abydon and Skaen challenges" ---> (Patch 2.1)
- "Mega Boss for those who adhere to the "get good" philosophy" ---> (Free DLC6, LAXF)
- "An entire DLC focused around proving your worth" ---> (Paid DLC2, LAX01) & (Patch 3.0)
I wouldn't have brought it up if there weren't some confirmation via data-mining that the Megabosses were indeed a separate DLC, the mysterious LAXF package that I started seeing references to a little over a month ago.