hey, maybe the twist will be that in order to evade capture by the Sith Lords you go to a mining facility that floats above the clouds, in a kind of "cloud city" (let's call it Respin).
it turns out that the head of the facility is an old friend of one of the NPCs, a scoundrel who used to own the Ebon Hawk (let's call him Blando Tarlissian) but lost it in a card game to the NPC.
Blando offers to fix the Hawk, but the party have to stay in the "cloud city" for an unspecified period. in the meantime, one of your droids goes missing (the prissy protocol droid, called P-3C0) and one of the other NPCs (a sassy princess named Jleia) begins to suspect that not everything is as it seems.
then Blando invites the party to dinner, but when the party enters the dining hall they discover THE BIG TWIST!
...
actually, i haven't figured out what the twist should be yet, but i figure Obsidian will be able to think of something...