Skyborne, Forsaken Paladins and Dwarf Shamans announced

The first confirmed character additions

Blizzard explicitly named Forsaken Paladin and Dwarf Shaman alongside Skyborne’s Alliance or Horde choice. This page preserves that announcement; the WoW Forever Races and Classes guide is the maintained reference for the full confirmed additions.

Both factions: Warrior, Hunter, Rogue and Druid. Horde also gets Shaman; Alliance also gets Mage. [source]

Skyborne and its starting experience require Heroic Pack or higher. The official edition terms separate this unlock from base access. [source] [source]

The optional race unlock is separate from base subscription access. Before planning a character, compare the faction-specific class choices in the guide and check the access terms in the beta guide.