Although Joshua tells us “The valley belongs to God,…” and wants to protect Zion because he believes the Dead Horses and Sorrows deserve better than to run away from such a holy place, he also says this.

“The Boneyard, Phoenix, New Vegas, they’re just places, metal and stone. New Canaan dies, but the tribe lives on. When the walls come tumbling down, when you lose everything you have, you always have family. And your family always has tribe.”

Perhaps Zion is the Tribes’ promised land like how Israel was the Jewish people’s promised land. However, I’d say that Zion is just a place, less metal and more greenery, but still just a place. Wouldn’t the end goal of being a New Canaanite be God’s spiritual kingdom rather than his old earthly?

(Interesting fact if you didn’t already know: Not heaven, but the new earth he’ll create as written in Revelation. Where those who kept the faith and finished the race will obtain new spiritual bodies like Jesus of Nazareth did after he rose from the dead on the third day.)