What happens at the end of the movie knowing?

Answer 1

Arriving back at Lucinda's mobile home, John (Nicholas Cage) discovers the children are safe and comfortable in the presence of the "whisper people." The "whisper people" are revealed to be celestial angel-like beings who invite the children to escape the destruction "to help everyone start over." At first, Caleb (John's son) is very reluctant to go when his father is not invited to come along; John successfully persuades him to go, saying that they will be together again eventually. The group of "whisperers" leave Earth on their "ship," a massive structure resembling Ezekiel's Wheel, as other ships also depart Earth. As anarchy reigns in Boston, John arrives to be with his father, mother, and sister just as the solar flare strikes Earth and kills all life on the planet. In the last scene, Caleb and Abby (Lucinda's grand-daughter) are dropped off on what appears to be a new Earth (albeit with at least two moons) as the other ships drop off their passengers. The movie ends as the two children, dressed in entirely white garments, run toward a large white tree, possibly being the Tree of Life.

Answer 2

Earth is destroyed by a solar flare. The two kids, along with many others, are relocated to one or more Earth-like planets by the angels.

You can clearly see there are at least 2 moons in the sky, and everything is of different color. The children, as well as other chosen ones, were dropped off at a new planet to continue the human race there. The tree you see at the end is the Tree of Life. So in a sense, they are Adam and Eve, or at least one of several.

Answer 3

The old "parents" die and the kids get taken to a different world.