I see the patch notes, there is a copy-paste mistake from the Thieves Guild Patch notes:

or do I understand it somehow wrong?

"New Motifs
The Thieves Guild, Abah’s Watch, and Assassins League crafting styles are now available to craft.
You’ll be able to find the Chapters (or rarely, the full Book) for the Thieves Guild crafting style in the Unidentified Equipment boxes obtained as a reward for performing Heists to the Thieves Guild's highest standards.
The Style Item, "Fine Chalk", or its component "Rough Chalk", can be found in some Thieves Troves.
The Abah's Watch inimitable style is also now available for crafters to learn, and can find the Chapters (or rarely, the full Book) in the Large Laundered Shipments obtained from the repeatable quests found in the Thieves Guild hideout.
The Style Item, a "Polished Shilling", can sometimes be found by pickpocketing any guard throughout the world (not just in Abah's Landing!).
The Assassins League style is available for aspiring assassins, and chapters can be found by defeating bosses in the Gold Coast area.
The Style Item, "Tainted Blood" can be refined from Dried Blood, obtained solely from use of the Blade of Woe.
One's ability to harvest blood from kills with the Blade of Woe is dependent both on their knowledge of the Assassins League style, and their rank in the Dark Brotherhood."

http://forums.elderscrollsonline.com/en/discussion/261799/pts-patch-notes-v2-4-0/p1

Here's a bit of information to get you super hyped:)

Ashlander Style is already in-game, through the "Coat of the Red Mountain" dropped set and the Crown Store costume pack. It's not craftable though, as the Ashlander Motif has yet to become either numbered or obtainable.

You can also aquire two unique, setless pieces of Ashlander styled gear as unique drops from certain Dark Anchor generals.
Light Helm --> Hood of the Voidguide
Medium Helm --> Mask of the Darkest Seducer

The Morag Tong motif also exists in the game files. We have a Crown Store picture that shows it will become purchaseable for Crowns, signaling in-game future craftability!!!!

We have ALSO recieved tons of information regarding a Vvardenfell DLC from dataminers.

To lay it out in the simplest form, we will recieve a DLC in Vvardenfell where the prevalent Morag Tong and Ashlanders live with their craftable motifs. At least, Morag Tong is definitely craftable. Ashlander is not 100% confirmable yet due to the motif's number not being found.

EDIT: For reference