Creation and when satan fell

'In the begining God created the heavens and the earth, now the earth was formless'(Gen 1:1). The Hebrew text does not say 'now' but the earth 'she became' formless, the same word used when Lot's wife 'became' a pillar of salt. This is when satan was banished to the earth for his pride. Which is why only the light was good on day one and nothing was good on day two until the earth came out of the water on day three. All God could see on day two, in the water, was satan and his fallen followers. Since God chose to take 6 days to perfect the planet for mankind why did He choose the same planet? Does this mean we have more to do than just worship God?