So crazy or not, I think space battles should be added to the game. Not as a DLC, but as a big update so everyone can play it. The reason I think space battles should be added is because it would liven up the game and many people would like to have more playable space battles than just the one in Reach. If it isn’t a good idea or if it just wouldn’t work, that would be understandable.
I love the idea, I think adding it as a sepersep game would be the best route though.