I hadn't even considered a space-only swgb 2. I had figured they would make a larger scale engine and air would have a larger role with stronger fighters and gigantic capitol ships, and ground would still be an important factor. The only civ they would have trouble with space-only is with the gungans for obvious reasons.
The tf has enough aircraft in the movies alone, and if they took concept art from existing games, you have a full fleet. The Wookiees, they could have one civ they could be creative on, Wookiees in space isn't impossible.
Naboo, somewhat similiar to the tf. Confederacy certainly had aircraft also. With all the ep. 2 games and other information the Republic would be more than logical.
Zone names: ChewbaccaChew (it used to be fgjjkteetherta).