What's Going to Happen in the New Creation?

Catholic theology is based on the Old Testament. There was one king who reigned over all 12 tribes after David. After Solomon, 12 tribes are divided up. And 10 northern tribes are taken off in the exile and they're never heard from them again. Well Jesus, by appointing 12 apostles, is pointing to the reality that there will be a restoration of Israel. That all Israel will be restored.