I can totally see a flying city, too... and it's name'd be Garlemald. And, again, I don't see airship battles being all that popular unless there was some manner of incentive to it. "Just because" didn't do a thing for Galaxies because everyone wanted to be the pilot and noone wanted to be Mr. Fixit. Literally that was the only incentive to it in Galaxies, the fun of being the person flying the ship.