Planetary Annihilation is already an awesome game but i think we could jump start with ideas for wanted DLC ideas. One such idea would be useful if a stalemate has been reached between two solar systems. A Solar Fusion Inhibitor. An idea for a really expensive missile capable of detonating a star causing the destruction of an entire solar system.
"Hey, what do you want in this cool new game?" "Who cares! What do we want you to sell us AFTER it comes out " *game comes out* "OMG DLC you guiz are moneygrubbing scammers"
None. Zero. Zilch. Nada. I despise DLC (well, the modern variant, where you pay loads of money for only a few thingies).