Ima get flamed for this but...........what the hell.
As much as I enjoy conquering the AI or another player, planet by planet. But Id like to see a custom battle add-on.
Basically same thing happens as in any custom battle. Choose your location, choose your conditions, choose your units.
You could face off against fully upgraded starbases or just unleash hell against another Super Fleet.
Again i know people are gonna shoot holes in this, but..........id like to see it in this game.