http://www.neogaf.com/forum/showthread.php?t=800661
-You'll go beyond earth as the title implies, making it more like Alpha Centauri.
- Out this Autumn
- You start on an alien world
- There are three types of worlds: Lush, Airy and Fungal
- You'll still be building cities like in CIv V but to expand to other planets you'll use outposts.
- You can be the first to explore a new planet and you may find some neutral creatures/races on those worlds. You can either destroy them or leave them be.
- Relics are still in.
- You can win the game by returning to earth. To do that you'll need to put a satellite in orbit around the earth and you can either return to earth to win or you can bring the refugees of earth to your home world.
- You can use diplomacy with other players right from the start.
- Fog of War is still present
- There are now orbital units that you can command like satellites.