Cosmology in the religious as opposed to the secular, anti-theist context, is the explanation of the origin, evolution, and eventual fate of the universe, from a more natural, religious perspective. It is also largely irrelevant to us mortals. Our personal cosmology is what we should be concerned about, not Creation’s.
So, rather than considering Heaven’s plan for creation, consider the state of your own soul and the angel and devil on your shoulders.
Of course, if you’re at all like me, you’re more likely considering how to get either your angel or your devil on both your shoulders. 😉