I hope that the Forerunner planet will have lots of wildlife. In the demo we saw, it’s a big jungle, but all there were were prometheans and covenant. I thought it was really cool to have animals in Reach, like those Guta you had to fight, and you can always see a little moa running around. It add variety to the game.
All we really need is Moa. Other things would be cool, but Moa are the most important.