At launch there's only earth, the moon, mars, Venus, the reef and mercury has a MP map. And as for the gas giants I'm thinking maybe a vex compound that floats in the atmosphere. Or for Jupiter there are 4 major moons that could be levels. They could do a lot with it, what I'm excited for is outside the solar system. The ships have different classes, and even though they're purely aesthetic, seething things like "near star drive, and long range interstellar ship" make me hopeful that we'll be venturing well beyond the Sol system.