Well, we know that we'll have the ability to crush an asteroid on an ennemy base; but what about an entire planet?. if a player manage to fully colonise an entire planet; he could terraform (idk if it's the good term) it as a kinetic asteroid. This will cause the destruction of both of thoses two planets. And before the crash; the player could evac the kinetic planet with some air carriers and settle on the new planet which will be a land of devastation without ennemy units.