9 Movie Prequels That Created Massive Plot Holes

7. What's Up With All The Different Bishops? - Alien Vs. Predator

Alien's "haunted house in space" plot is kicked into action by a typically current idea - corporate interference. The nefarious Weyland-Yutani company are hunting a perfect alien organism for military gain, putting their everyday space workers on the chopping block for it.

Alien Vs. Predator takes a big dump over that idea, revealing Yautja were breeding Xenomorphs on Earth back in the early 21st Century. But that logic leap pales in comparison to this doozy, all brought about because Lance Henriksen needed a paycheck.

Henriksen first appeared as Bishop, the series only nice and unannoying android, in Aliens, then popped up at the end of Alien 3 as Bishop II, the human creator of his earlier character. That's already a bit tenuous, but fits the timeline thereabouts. Ten years later, he became the only cast member from the original run of either Alien or Predator to play a part in the dismal franchise versus. Here he was playing Charles Bishop Weyland, founder of the Weyland corporation, a role whose in-joke potential couldn't make up for all the questions it made.

Why was a regular android designed on and named after a CEO from centuries ago? Why did Bishop II bleed when smacked with a pipe if he wasn't a human? How did Henriksen go from The Terminator and Aliens to this?

You could argue the movie, and it's somehow worse sequel Requiem, aren't canon, but that betrays all the clear effort put in to make the events gel with both series' established continuity. Prometheus furthered the whole confusion, throwing in an unconvincingly aged Guy Pearce as Peter Weyland. But as, by Ridley Scott's own admission, that film was a prequel to only his original Alien, disregarding anything that came after (even Aliens - there's no Yutani), that's more a ret-con that a plot hole.