User blog:Dark Lord Mairon/Could Arda be Our World before it was created?

This title might seem pretty strange... but I was watching / reading some stuff about the book Silmarillion and other of tolkien's worlds and I heard something interisting.

The men (well we're men [and woman, dont forget them]) were given of the gift to death to choose their destine and enjoy their lives more. Its said that when they die their souls go help Eru (if they were nice and are worthy this task), just like humans go to heaven with God when they die...

On the battle of dagor dagorath its said by Mandos that Morgoth will return and will lead to a war where he will once for all be defeated by Tulkas and Turin Turumbar. The world so would end and would be re-made / re-shaped.

Well God created Earth, Eru created arda what Im trying to say is... what if Tolkien wanted to say that before our actual world there was another, created by the same entity and is showing us that if we dont be nice and take care of our world it will just end and restart again? Dinosaurs, people...