When we die, our bodies go into the Ground, but our Spirit lives on and goes to the Spirit World.
Meg's body is still outside against a rock, but Hercules comes to the Underworld to retrieve Meg's Spirit from the grasp of Hades.
2 Nephi 2:27
Jesus Christ also came to make the 'Resurrection' possible. He is the 'First Fruits of them that Slept'.
Because of the Resurrection of Christ we shall all be Resurrected.
Hercules (the Son of Zeus) was willing to give up everything, even his own life, to save Meg.
Christ (the Son of God) was willing to give up everything, even His own life, to save us all.
Alma 7:12, John 15:13
After having reunited Meg's Spirit with her Body, the two of them are 'called up' to mount Olympus.
During the Millennium, After the Second Coming of Christ, the Resurrection will take place, and After the Resurrection we will all be 'called up' to be Judged before God.
This Judgement is the Final Judgement. Our Eternal Destiny will be decided on the Choices we made in Mortality. Alma 12:27
Only when he is with Meg is Hercules Happy.