Maris Brood returning would definately put a twist on things. Maybe she falls in love with StarKiller and Juno gets ticked off?
And is there anyway someone could mod TFU1 so you can play as Juno? I know it would probably be extremely hard, considering she appears in an actual level once; but I've always wanted to play as her for some reason. It'd be amusing to see a hot blonde with a lightsaber chopping up stormies, eh?
And by nice pair of lightsabers, I assume you were referring to something else?