Geonosis is a must, as in the first flashpoint for the empire characters the droid that guides you was collected from geonosis after being upgraded on the planet. also, there are geonosians on tatooine, which proves that the geonosians have the droid factories up and running, and that there are ready for war with the republic/empire. it could be the storyline after maked. trying to stop the empire/republic taking over the droid factories and producing an army.