A large portion of the new Elemental Bonds quest line available for players in Hyjal involves ex-Warchief Thrall struggling to come to terms with different facets of himself and his life to date: Uncontrolled, unchecked anger at the circumstances of his youth, worry and fear that no matter what he does in his life, it will never be the right thing. And in the midst of all of this, a strong, overbearing desire to just settle down with his woman, have some kids, and just be a family man -- something for which he feels incredibly guilty. After all, when the weight of a dying world rests on your shoulders, the last thing you should be thinking about is starting a family.
He comes to terms with all of this, however, and emerges even stronger than before. It seems as though Thrall is prepared to be the savior of Azeroth, the one who will stand with the Aspects at whatever designated time lies before us in the not too distant future and make certain that the world is restored, whole and complete. The one who can properly fill in as Earthwarder. Except ... being the world's savior doesn't leave much time for raising a family, does it? That deep-down desire to just be a normal orc and raise a normal family doesn't seem to be an option at this point -- after all, the world will need someone to continue to faithfully watch it, after Deathwing is gone. Unless, of course, Thrall isn't the savior of Azeroth at all.
Perhaps that fate rests on one tiny, fragile egg.