All of it I would hope. I don’t know a single Horde player who cares about Ashenvale; or ever cared about it tbh. Locals to the South like Stonetalon, Dustwallow, Desolace, and Feralas are more interesting as contention points, and always have been. The only reason Blizz has ever forced the Horde to fixate on Ashenvale is because it keeps that Faction Conflict stoked the most. The Lumber was never worth the costs of getting it.
The Horde blowing up that Goblin made passage between Ashenvale and Stonetalon and asserting more control over that region? There are Goblin, Darkspear and Grimtotem settlements already there to build or repair relations with. The Horde moving into Dustwallow and making stronger ties with the Grimtotem, Stonemaul, and Mudsprocket settlements already there, resulting in the same? The Tauren reasserting and reclaiming more of a presence of their ancestral homelands in Feralas and Desolace again? The Bilgewater under Gazlowe making inroads with Mudsprocket, the TN’s Barge, and Gadgetzan to get easier access to Ungoro? Yeah, these were all zones the Horde should be interested in far more than that deathtrap of a Forest next door; but none of those regions would stoke the Faction Conflict quite the same way. Nor reopen the deepest wounds.