@ami_angelwings Maybe a strange one, but I hate when the "twist" is that the whole thing was a right-wing moral play all along. Bonus points if making the moral play work requires throwing out the entire premise in the third act.

See Ghostbusters (government regulation is bad), Bee Movie (labor unions make everyone lazy and destroy the economy), or even Ayn Rand's Anthem (women should be subservient). At least with Rand's later work, she feels less obliged to tricking her audience...

@ami_angelwings I'll third "it was all a dream", but specifically to contrast it with "time travel made it so none of that happened", which I have grown much more tolerant of over the years. At least in a time travel story, you're seeing how the actual characters would react in a situation.