10 More Horror Movie Sequels That Were Just Too Cruel

10. Alien: Covenant

Despite serving as a sequel to Prometheus, Alien: Covenant basically disregarded the end of that movie, where surviving hero Elizabeth Shaw (Noomi Rapace) departed in search of the Engineer homeworld with the remnants of android David (Michael Fassbender) in tow.

But when we reconvene with David in the sequel, he reveals to the crew of the Covenant that Shaw died when their ship crash-landed on Planet 4. 

However, in the third act it's revealed that David killed and experimented upon Shaw, her mutilated remains being discovered in his crude lab.

For anyone who bought into what Prometheus was promising, this was a massive bummer, and one that's never really been sufficiently explained production-wise. 

Given that Rapace did reprise the role of Shaw in a pre-release prologue video for the movie, why didn't she have a role in the actual movie itself?

But that's hardly the end of the cruelty. Alien: Covenant of course ends with David switching places with his android "brother" Walter and tricking Daniels (Katherine Waterston) and Tennessee (Danny McBride) into entering cryosleep, the implication being that they and the other sleeping colonists will become his next experiments.

As Covenant underperformed at the box office and the decidedly more successful Alien: Romulus has branched off in another direction entirely, it seems unlikely we'll ever see David get his comeuppance. He won.