Blizzard updated the WoW Classic PTR to Patch 1.15 Build 52124, which included some Season of Discovery items and spells. We previously covered Datamined Spells, Ashenvale Mounts, World Buffs, Future Rune Engraving Slots, and now we also have datamined some Warsong Gulch specific Helmets!
Blizzard did reveal in our Blizzcon interview that there would be new Warsong Gulch Reputation items added to the Warsong Reputation vendors. Additionally, you will be able to earn Warsong Gulch specific Reputation by participating in the new Ashenvale World PvP event.
While these items are in the data, it doesn't necessarily mean they will be implemented. They very well could be leftover data from something removed, or even just test items.