The Horde were always seen as the underdogs but has the gap between the Horde and the Alliance grown so large that the Horde has little chance of winning an all out war?
Siege of Orgrimmar took a heavy toll on the Horde and especially the orcs, the former backbone of the Horde.
The Blood Elves' loyalties aren't what they used to be.
The trolls lost their only real leader.
The Forsaken, while a powerful faction, are doomed to stagnation and inevitable decay thanks to Genn.
Does the Horde have any hope should they become enemies with the Alliance once again?