Did Blizzard accidentally leak info on the new expansion ?

Taken from Wowhead's recent PTR datamining article :"There are eight icons in the database for Kul Tiras Quest Armor. These icons all follow the naming scheme of Inv_boots_cloth_kultirasquest_b_01, which is very similar to the naming scheme of icons used for quest gear in previous expansions.Zooming in on the side armor on the skirt, we can more clearly see a map to a new zone"We might finally have the Kul'Tiras expansion.