It's Beginning to Look a Lot Like Christ-Mess

 a limited-time questline released on November 27, 2017, as part of A Rigellian Christmas 2017 Promotion.

Start
Unlocks Kang and Kodos.

End
No dialogue.

End
No dialogue.

Start
Unlocks Rigellian Christmas Spaceship.

End
No dialogue.

End
No dialogue.