Premiering during tonight's episode of Legion, 20th Century Fox released a new prologue for its upcoming Alien: Covenant, entitled "Last Supper."Featuring the headlining crew of the titular colony ship Covenant, the Last Supper prologue gives viewers a chance to experience the crew's final toast before going entering cryosleep.Opening with Michael Fassbender as the android Wesley performing a medical on Daniels (Katerine Waterson), the prologue moves on to show the ship captain Branson (James Franco) heading to bed early due to feeling poorly.