I honestly don't know if destruction is the only option. I would guess that--God being God, after all--He could do whatever pleased Him. However, I see His proclamation of creation being good as "suitable" for His ultimate creation--man. Thus, the physical creation of Earth and the Universe holds no intrinsic value.
Whether that is true or not, I don't know. I do know I can rest easy knowing that that He has everything under control. :)
That's for sure.