We've datamined some information from the new Earthen Allied Race, including their racial abilities, paladin mount, character screen background, and heritage armor.
Earthen's racial abilities include the first-ever non-evoker empowered spell.
This is the charger mount that Earthen Paladins will unlock.
This is the screen shown at the character selection screen when picking an Earthen character.
Note that some textures from the Helm are missing right now.