1: jet pack/truster pack (to help build cool terrain)
2: Green Housing (cool detail to look at. Grow plants)
3: Railway (would be an awesome addition)
4: space station!
5: More people to play with (I have more than 4 friends.. 360 of em)
6: Different terraforming sizes"small medium large" (for better terraforming)
7: Aliean life
8: Space craft (to fly around..why not)
9: the ability to build other bases far away
10: A Hanger
All I got for now for ideas.. Would be very interesting to see these in the game.