Horde, once again united as strongly as ever, kick the Alliance the hell out of Orgrimmar. Then a huge anvil drops on Aggra, crushing her into a bloody pancake. Thrall is enraged by this, tears off his bathrobe and totes the Doomhammer armor once more. Everybody bows before the renewed true Warchief and Vol'jin founds a club in Cleft of Shadow, where he comes out of the closet and is openly transsexual, conducting drag queen comedy shows for the customers' entertainment. Lor'themar, having found his nuts in the previous patches, takes it up to himself to create a proper blood elf district into Orgrimmar, which is built next to Valley of Honor, serving simultaneously as a proper harbor for the Horde.
Politics-wise, we're back to Cold War, but there are some quite riled up feelings about, so one can imagine the H-A war hasn't left definitively.