First, you play the game regularly, except instead of launching just the satellite, you are given an option to launch whatever item you choose with a rocket. Game keeps score of which items you have launched.
At any time after launching the first rocket you can decide to end the first game and start a new game plus.
Here is the catch: you get to start with any and all of the items you launched in the first game.
These items would be very helpful to give you a head start obviously.
Also, I was thinking the new game plus should have forced higher difficulty. You would get attacked very soon after you land so you´d better have launched some armor, weapons, electric grid and laser turrets

Basically you would land on a HOT LZ weapons blazing and then you set up your defenses and basic production site.
I was thinking though that the new game plus territory would also be incredibly mineral rich so you would have the benefit of getting MASSIVE production going on there if you survive.